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/* @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC */
/*
* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
* unrestricted use provided that this legend is included on all tape
* media and as a part of the software program in whole or part. Users
* may copy or modify Sun RPC without charge, but are not authorized
* to license or distribute it to anyone else except as part of a product or
* program developed by the user.
*
* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
*
* Sun RPC is provided with no support and without any obligation on the
* part of Sun Microsystems, Inc. to assist in its use, correction,
* modification or enhancement.
*
* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
* OR ANY PART THEREOF.
*
* In no event will Sun Microsystems, Inc. be liable for any lost revenue
* or profits or other special, indirect and consequential damages, even if
* Sun has been advised of the possibility of such damages.
*
* Sun Microsystems, Inc.
* 2550 Garcia Avenue
* Mountain View, California 94043
*/
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro";
#endif
/*
* clnt_simple.c
* Simplified front end to rpc.
*
* Copyright (C) 1984, Sun Microsystems, Inc.
*/
#include <alloca.h>
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <rpc/rpc.h>
#include <sys/socket.h>
#include <netdb.h>
#include <strings.h>
static struct callrpc_private
{
CLIENT *client;
int socket;
u_long oldprognum, oldversnum, valid;
char *oldhost;
}
*callrpc_private;
int
callrpc (const char *host, u_long prognum, u_long versnum, u_long procnum,
xdrproc_t inproc, const char *in, xdrproc_t outproc, char *out)
{
struct callrpc_private *crp = callrpc_private;
struct sockaddr_in server_addr;
enum clnt_stat clnt_stat;
struct hostent hostbuf, *hp;
struct timeval timeout, tottimeout;
if (crp == 0)
{
crp = (struct callrpc_private *) calloc (1, sizeof (*crp));
if (crp == 0)
return 0;
callrpc_private = crp;
}
if (crp->oldhost == NULL)
{
crp->oldhost = malloc (256);
crp->oldhost[0] = 0;
crp->socket = RPC_ANYSOCK;
}
if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum
&& strcmp (crp->oldhost, host) == 0)
{
/* reuse old client */
}
else
{
size_t buflen;
char *buffer;
int herr;
crp->valid = 0;
if (crp->socket != RPC_ANYSOCK)
{
(void) close (crp->socket);
crp->socket = RPC_ANYSOCK;
}
if (crp->client)
{
clnt_destroy (crp->client);
crp->client = NULL;
}
buflen = 1024;
buffer = __alloca (buflen);
while (__gethostbyname_r (host, &hostbuf, buffer, buflen,
&hp, &herr) < 0)
if (herr != NETDB_INTERNAL || errno != ERANGE)
return (int) RPC_UNKNOWNHOST;
else
{
/* Enlarge the buffer. */
buflen *= 2;
buffer = __alloca (buflen);
}
timeout.tv_usec = 0;
timeout.tv_sec = 5;
bcopy (hp->h_addr, (char *) &server_addr.sin_addr, hp->h_length);
server_addr.sin_family = AF_INET;
server_addr.sin_port = 0;
if ((crp->client = clntudp_create (&server_addr, (u_long) prognum,
(u_long) versnum, timeout, &crp->socket)) == NULL)
return (int) rpc_createerr.cf_stat;
crp->valid = 1;
crp->oldprognum = prognum;
crp->oldversnum = versnum;
(void) strncpy (crp->oldhost, host, 255);
crp->oldhost[256] = '\0';
}
tottimeout.tv_sec = 25;
tottimeout.tv_usec = 0;
clnt_stat = clnt_call (crp->client, procnum, inproc, (char *) in,
outproc, out, tottimeout);
/*
* if call failed, empty cache
*/
if (clnt_stat != RPC_SUCCESS)
crp->valid = 0;
return (int) clnt_stat;
}
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