minix/lib/libc/rpc/clnt_raw.c

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/* $NetBSD: clnt_raw.c,v 1.32 2013/03/11 20:19:29 tron 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.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char *sccsid = "@(#)clnt_raw.c 1.22 87/08/11 Copyr 1984 Sun Micro";
static char *sccsid = "@(#)clnt_raw.c 2.2 88/08/01 4.0 RPCSRC";
#else
__RCSID("$NetBSD: clnt_raw.c,v 1.32 2013/03/11 20:19:29 tron Exp $");
#endif
#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.
*/
#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>
#ifdef __weak_alias
__weak_alias(clntraw_create,_clntraw_create)
__weak_alias(clnt_raw_create,_clnt_raw_create)
#endif
#ifdef _REENTRANT
extern mutex_t clntraw_lock;
#endif
#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 enum clnt_stat clnt_raw_call(CLIENT *, rpcproc_t, xdrproc_t,
const char *, xdrproc_t, caddr_t, struct timeval);
static void clnt_raw_geterr(CLIENT *, struct rpc_err *);
static bool_t clnt_raw_freeres(CLIENT *, xdrproc_t, caddr_t);
static void clnt_raw_abort(CLIENT *);
static bool_t clnt_raw_control(CLIENT *, u_int, char *);
static void clnt_raw_destroy(CLIENT *);
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 = calloc((size_t)1, sizeof (*clp));
if (clp == NULL)
goto out;
if (__rpc_rawcombuf == NULL)
__rpc_rawcombuf =
malloc(UDPMSGSIZE);
if (__rpc_rawcombuf == NULL)
goto out;
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("%s: Fatal header serialization error", __func__);
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);
out:
if (clp)
free(clp);
mutex_unlock(&clntraw_lock);
return NULL;
}
/* ARGSUSED */
static enum clnt_stat
clnt_raw_call(CLIENT *h, rpcproc_t proc, xdrproc_t xargs, const char *argsp,
xdrproc_t xresults, caddr_t 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;
_DIAGASSERT(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, (int32_t *)&proc)) ||
(! AUTH_MARSHALL(h->cl_auth, xdrs)) ||
(! (*xargs)(xdrs, __UNCONST(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_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))
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
clnt_raw_geterr(CLIENT *cl, struct rpc_err *error)
{
}
/* ARGSUSED */
static bool_t
clnt_raw_freeres(CLIENT *cl, xdrproc_t xdr_res, caddr_t 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, char *str)
{
return (FALSE);
}
/*ARGSUSED*/
static void
clnt_raw_destroy(CLIENT *cl)
{
}
static struct clnt_ops *
clnt_raw_ops(void)
{
static struct clnt_ops ops;
#ifdef _REENTRANT
extern mutex_t ops_lock;
#endif
/* 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);
}