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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Portions of this source code were derived from Berkeley
* 4.3 BSD under license from the Regents of the University of
* California.
*/
/*
* Simplified front end to client rpc.
*/
#include "mt.h"
#include "rpc_mt.h"
#include <stdio.h>
#include <errno.h>
#include <rpc/rpc.h>
#include <string.h>
#include <sys/param.h>
#include <stdlib.h>
#include <unistd.h>
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif
#ifndef NETIDLEN
#define NETIDLEN 32
#endif
struct rpc_call_private {
int valid; /* Is this entry valid ? */
CLIENT *client; /* Client handle */
pid_t pid; /* process-id at moment of creation */
rpcprog_t prognum; /* Program */
rpcvers_t versnum; /* version */
char host[MAXHOSTNAMELEN]; /* Servers host */
char nettype[NETIDLEN]; /* Network type */
};
static void
rpc_call_destroy(void *vp)
{
struct rpc_call_private *rcp = (struct rpc_call_private *)vp;
if (rcp) {
if (rcp->client)
CLNT_DESTROY(rcp->client);
free(rcp);
}
}
/*
* This is the simplified interface to the client rpc layer.
* The client handle is not destroyed here and is reused for
* the future calls to same prog, vers, host and nettype combination.
*
* The total time available is 25 seconds.
*/
enum clnt_stat
rpc_call(const char *host, const rpcprog_t prognum, const rpcvers_t versnum,
const rpcproc_t procnum, const xdrproc_t inproc, const char *in,
const xdrproc_t outproc, char *out, const char *netclass)
{
struct rpc_call_private *rcp;
enum clnt_stat clnt_stat;
struct timeval timeout, tottimeout;
static pthread_key_t rpc_call_key = PTHREAD_ONCE_KEY_NP;
char nettype_array[NETIDLEN];
char *nettype = &nettype_array[0];
if (netclass == NULL)
nettype = NULL;
else {
size_t len = strlen(netclass);
if (len >= sizeof (nettype_array)) {
rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
return (rpc_createerr.cf_stat);
}
(void) strcpy(nettype, netclass);
}
rcp = thr_get_storage(&rpc_call_key, sizeof (*rcp), rpc_call_destroy);
if (rcp == NULL) {
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = errno;
return (rpc_createerr.cf_stat);
}
if ((nettype == NULL) || (nettype[0] == '\0'))
nettype = "netpath";
if (!(rcp->valid &&
rcp->pid == getpid() &&
rcp->prognum == prognum &&
rcp->versnum == versnum &&
strcmp(rcp->host, host) == 0 &&
strcmp(rcp->nettype, nettype) == 0)) {
int fd;
rcp->valid = 0;
if (rcp->client)
CLNT_DESTROY(rcp->client);
/*
* Using the first successful transport for that type
*/
rcp->client = clnt_create(host, prognum, versnum, nettype);
rcp->pid = getpid();
if (rcp->client == NULL)
return (rpc_createerr.cf_stat);
/*
* Set time outs for connectionless case. Do it
* unconditionally. Faster than doing a t_getinfo()
* and then doing the right thing.
*/
timeout.tv_usec = 0;
timeout.tv_sec = 5;
(void) CLNT_CONTROL(rcp->client,
CLSET_RETRY_TIMEOUT, (char *)&timeout);
if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)&fd))
(void) fcntl(fd, F_SETFD, 1); /* close on exec */
rcp->prognum = prognum;
rcp->versnum = versnum;
if ((strlen(host) < (size_t)MAXHOSTNAMELEN) &&
(strlen(nettype) < (size_t)NETIDLEN)) {
(void) strcpy(rcp->host, host);
(void) strcpy(rcp->nettype, nettype);
rcp->valid = 1;
} else {
rcp->valid = 0;
}
} /* else reuse old client */
tottimeout.tv_sec = 25;
tottimeout.tv_usec = 0;
clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *)in,
outproc, out, tottimeout);
/*
* if call failed, empty cache
*/
if (clnt_stat != RPC_SUCCESS)
rcp->valid = 0;
return (clnt_stat);
}
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