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/*
* svc_simple.c
* Simplified front end to rpc.
*
* 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 <stdio.h>
#include <string.h>
#include <libintl.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <sys/socket.h>
#include <netdb.h>
#ifdef USE_IN_LIBIO
# include <wchar.h>
# include <libio/iolibio.h>
#endif
struct proglst_
{
char *(*p_progname) (char *);
int p_prognum;
int p_procnum;
xdrproc_t p_inproc, p_outproc;
struct proglst_ *p_nxt;
};
#ifdef _RPC_THREAD_SAFE_
#define proglst RPC_THREAD_VARIABLE(svcsimple_proglst_s)
#else
static struct proglst_ *proglst;
#endif
static void universal (struct svc_req *rqstp, SVCXPRT *transp_s);
#ifdef _RPC_THREAD_SAFE_
#define transp RPC_THREAD_VARIABLE(svcsimple_transp_s)
#else
static SVCXPRT *transp;
#endif
int
__registerrpc (u_long prognum, u_long versnum, u_long procnum,
char *(*progname) (char *), xdrproc_t inproc, xdrproc_t outproc)
{
struct proglst_ *pl;
char *buf;
if (procnum == NULLPROC)
{
if (__asprintf (&buf, _("can't reassign procedure number %ld\n"),
NULLPROC) < 0)
buf = NULL;
goto err_out;
}
if (transp == 0)
{
transp = svcudp_create (RPC_ANYSOCK);
if (transp == NULL)
{
buf = strdup (_("couldn't create an rpc server\n"));
goto err_out;
}
}
(void) pmap_unset ((u_long) prognum, (u_long) versnum);
if (!svc_register (transp, (u_long) prognum, (u_long) versnum,
universal, IPPROTO_UDP))
{
if (__asprintf (&buf, _("couldn't register prog %ld vers %ld\n"),
prognum, versnum) < 0)
buf = NULL;
goto err_out;
}
pl = (struct proglst_ *) malloc (sizeof (struct proglst_));
if (pl == NULL)
{
buf = strdup (_("registerrpc: out of memory\n"));
goto err_out;
}
pl->p_progname = progname;
pl->p_prognum = prognum;
pl->p_procnum = procnum;
pl->p_inproc = inproc;
pl->p_outproc = outproc;
pl->p_nxt = proglst;
proglst = pl;
return 0;
err_out:
if (buf == NULL)
return -1;
(void) __fxprintf (NULL, "%s", buf);
free (buf);
return -1;
}
compat_symbol (libc, __registerrpc, registerrpc, GLIBC_2_0);
static void
universal (struct svc_req *rqstp, SVCXPRT *transp_l)
{
int prog, proc;
char *outdata;
char xdrbuf[UDPMSGSIZE];
struct proglst_ *pl;
char *buf = NULL;
/*
* enforce "procnum 0 is echo" convention
*/
if (rqstp->rq_proc == NULLPROC)
{
if (svc_sendreply (transp_l, (xdrproc_t)xdr_void,
(char *) NULL) == FALSE)
{
__write (STDERR_FILENO, "xxx\n", 4);
exit (1);
}
return;
}
prog = rqstp->rq_prog;
proc = rqstp->rq_proc;
for (pl = proglst; pl != NULL; pl = pl->p_nxt)
if (pl->p_prognum == prog && pl->p_procnum == proc)
{
/* decode arguments into a CLEAN buffer */
__bzero (xdrbuf, sizeof (xdrbuf)); /* required ! */
if (!svc_getargs (transp_l, pl->p_inproc, xdrbuf))
{
svcerr_decode (transp_l);
return;
}
outdata = (*(pl->p_progname)) (xdrbuf);
if (outdata == NULL && pl->p_outproc != (xdrproc_t)xdr_void)
/* there was an error */
return;
if (!svc_sendreply (transp_l, pl->p_outproc, outdata))
{
if (__asprintf (&buf, _("trouble replying to prog %d\n"),
pl->p_prognum) < 0)
buf = NULL;
goto err_out2;
}
/* free the decoded arguments */
(void) svc_freeargs (transp_l, pl->p_inproc, xdrbuf);
return;
}
if (__asprintf (&buf, _("never registered prog %d\n"), prog) < 0)
buf = NULL;
err_out2:
if (buf == NULL)
exit (1);
__fxprintf (NULL, "%s", buf);
free (buf);
exit (1);
}
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