/*
 *	$Id: clnt_simple.c,v 4.2 1994/09/29 23:48:50 jraja Exp $
 *
 *	Simplified client front end to rpc.
 *
 *	Copyright © 1994 AmiTCP/IP Group,
 *			 Network Solutions Development Inc.
 *			 All rights reserved.
 */

/* @(#)clnt_simple.c    2.2 88/08/01 4.0 RPCSRC */
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro";
#endif

/*
 * Copyright (C) 1984, Sun Microsystems, Inc.
 */

#include <sys/param.h>
#include <stdio.h>
#include <rpc/rpc.h>
#include <sys/socket.h>
#include <netdb.h>

#ifdef NEW
#define CloseSocket(s) close(s)
#endif
/* Single element cache
 */
static struct callrpc_private {
	CLIENT	*client;
	int	socket;
	int	oldprognum, oldversnum, valid;
	char	*oldhost;
} *callrpc_private;

int
callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out)
	const char * host;
	u_long prognum, versnum, procnum;
	xdrproc_t inproc, outproc;
	void * in, * out;
{
	register struct callrpc_private *crp = callrpc_private;
	struct sockaddr_in server_addr;
	enum clnt_stat clnt_stat;
	struct hostent *hp;
	struct timeval timeout, tottimeout;

	if (crp == 0) {
		crp = (struct callrpc_private *)mem_calloc(1, sizeof (*crp));
		if (crp == 0)
			return (0);
		callrpc_private = crp;
	}
	if (crp->oldhost == NULL) {
		crp->oldhost = mem_alloc(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 {
		crp->valid = 0;
#ifdef AMITCP
		(void)CloseSocket(crp->socket);
#else
		(void)close(crp->socket);
#endif
		crp->socket = RPC_ANYSOCK;
		if (crp->client) {
			clnt_destroy(crp->client);
			crp->client = NULL;
		}
		if ((hp = gethostbyname(host)) == NULL)
			return ((int) RPC_UNKNOWNHOST);
		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) strcpy(crp->oldhost, host);
	}
	tottimeout.tv_sec = 25;
	tottimeout.tv_usec = 0;
	clnt_stat = clnt_call(crp->client, procnum, inproc, in,
	    outproc, out, tottimeout);
	/*
	 * if call failed, empty cache
	 */
	if (clnt_stat != RPC_SUCCESS)
		crp->valid = 0;
	return ((int) clnt_stat);
}