freebsd-dev/lib/libc/rpc/clnt_simple.c
Pedro F. Giffuni 8a16b7a18f General further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:49:47 +00:00

210 lines
6.3 KiB
C

/* $NetBSD: clnt_simple.c,v 1.21 2000/07/06 03:10:34 christos Exp $ */
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2009, Sun Microsystems, Inc.
* All rights reserved.
*
* 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 Sun Microsystems, 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.
*/
/*
* Copyright (c) 1986-1991 by Sun Microsystems Inc.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char *sccsid2 = "from: @(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro";
static char *sccsid = "from: @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* clnt_simple.c
* Simplified front end to client rpc.
*
*/
#include "namespace.h"
#include "reentrant.h"
#include <sys/param.h>
#include <stdio.h>
#include <errno.h>
#include <rpc/rpc.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include "un-namespace.h"
#include "mt_misc.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 struct rpc_call_private *rpc_call_private_main;
static thread_key_t rpc_call_key;
static once_t rpc_call_once = ONCE_INITIALIZER;
static int rpc_call_key_error;
static void rpc_call_key_init(void);
static void rpc_call_destroy(void *);
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);
}
}
static void
rpc_call_key_init(void)
{
rpc_call_key_error = thr_keycreate(&rpc_call_key, rpc_call_destroy);
}
/*
* 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.
*
* host - host name
* prognum - program number
* versnum - version number
* procnum - procedure number
* inproc, outproc - in/out XDR procedures
* in, out - recv/send data
* nettype - nettype
*/
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 *nettype)
{
struct rpc_call_private *rcp = (struct rpc_call_private *) 0;
enum clnt_stat clnt_stat;
struct timeval timeout, tottimeout;
int main_thread = 1;
if ((main_thread = thr_main())) {
rcp = rpc_call_private_main;
} else {
if (thr_once(&rpc_call_once, rpc_call_key_init) != 0 ||
rpc_call_key_error != 0) {
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = rpc_call_key_error;
return (rpc_createerr.cf_stat);
}
rcp = (struct rpc_call_private *)thr_getspecific(rpc_call_key);
}
if (rcp == NULL) {
rcp = malloc(sizeof (*rcp));
if (rcp == NULL) {
rpc_createerr.cf_stat = RPC_SYSTEMERROR;
rpc_createerr.cf_error.re_errno = errno;
return (rpc_createerr.cf_stat);
}
if (main_thread)
rpc_call_private_main = rcp;
else
thr_setspecific(rpc_call_key, (void *) rcp);
rcp->valid = 0;
rcp->client = NULL;
}
if ((nettype == NULL) || (nettype[0] == 0))
nettype = "netpath";
if (!(rcp->valid && rcp->pid == getpid() &&
(rcp->prognum == prognum) &&
(rcp->versnum == versnum) &&
(!strcmp(rcp->host, host)) &&
(!strcmp(rcp->nettype, nettype)))) {
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 *)(void *)&timeout);
if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd))
_fcntl(fd, F_SETFD, 1); /* make it "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;
/*LINTED const castaway*/
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);
}