208 lines
6.2 KiB
C
208 lines
6.2 KiB
C
/* $NetBSD: clnt_simple.c,v 1.21 2000/07/06 03:10:34 christos Exp $ */
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/*-
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* Copyright (c) 2009, Sun Microsystems, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1986-1991 by Sun Microsystems Inc.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char *sccsid2 = "from: @(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro";
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static char *sccsid = "from: @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* clnt_simple.c
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* Simplified front end to client rpc.
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*
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*/
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#include "namespace.h"
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#include "reentrant.h"
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#include <sys/param.h>
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#include <stdio.h>
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#include <errno.h>
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#include <rpc/rpc.h>
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#include <string.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "un-namespace.h"
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#include "mt_misc.h"
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#ifndef MAXHOSTNAMELEN
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#define MAXHOSTNAMELEN 64
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#endif
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#ifndef NETIDLEN
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#define NETIDLEN 32
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#endif
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struct rpc_call_private {
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int valid; /* Is this entry valid ? */
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CLIENT *client; /* Client handle */
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pid_t pid; /* process-id at moment of creation */
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rpcprog_t prognum; /* Program */
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rpcvers_t versnum; /* Version */
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char host[MAXHOSTNAMELEN]; /* Servers host */
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char nettype[NETIDLEN]; /* Network type */
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};
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static struct rpc_call_private *rpc_call_private_main;
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static thread_key_t rpc_call_key;
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static once_t rpc_call_once = ONCE_INITIALIZER;
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static int rpc_call_key_error;
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static void rpc_call_key_init(void);
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static void rpc_call_destroy(void *);
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static void
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rpc_call_destroy(void *vp)
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{
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struct rpc_call_private *rcp = (struct rpc_call_private *)vp;
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if (rcp) {
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if (rcp->client)
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CLNT_DESTROY(rcp->client);
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free(rcp);
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}
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}
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static void
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rpc_call_key_init(void)
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{
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rpc_call_key_error = thr_keycreate(&rpc_call_key, rpc_call_destroy);
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}
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/*
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* This is the simplified interface to the client rpc layer.
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* The client handle is not destroyed here and is reused for
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* the future calls to same prog, vers, host and nettype combination.
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*
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* The total time available is 25 seconds.
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*
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* host - host name
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* prognum - program number
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* versnum - version number
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* procnum - procedure number
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* inproc, outproc - in/out XDR procedures
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* in, out - recv/send data
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* nettype - nettype
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*/
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enum clnt_stat
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rpc_call(const char *host, const rpcprog_t prognum, const rpcvers_t versnum,
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const rpcproc_t procnum, const xdrproc_t inproc, const char *in,
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const xdrproc_t outproc, char *out, const char *nettype)
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{
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struct rpc_call_private *rcp = (struct rpc_call_private *) 0;
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enum clnt_stat clnt_stat;
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struct timeval timeout, tottimeout;
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int main_thread = 1;
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if ((main_thread = thr_main())) {
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rcp = rpc_call_private_main;
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} else {
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if (thr_once(&rpc_call_once, rpc_call_key_init) != 0 ||
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rpc_call_key_error != 0) {
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rpc_createerr.cf_stat = RPC_SYSTEMERROR;
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rpc_createerr.cf_error.re_errno = rpc_call_key_error;
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return (rpc_createerr.cf_stat);
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}
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rcp = (struct rpc_call_private *)thr_getspecific(rpc_call_key);
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}
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if (rcp == NULL) {
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rcp = malloc(sizeof (*rcp));
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if (rcp == NULL) {
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rpc_createerr.cf_stat = RPC_SYSTEMERROR;
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rpc_createerr.cf_error.re_errno = errno;
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return (rpc_createerr.cf_stat);
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}
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if (main_thread)
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rpc_call_private_main = rcp;
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else
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thr_setspecific(rpc_call_key, (void *) rcp);
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rcp->valid = 0;
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rcp->client = NULL;
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}
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if ((nettype == NULL) || (nettype[0] == 0))
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nettype = "netpath";
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if (!(rcp->valid && rcp->pid == getpid() &&
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(rcp->prognum == prognum) &&
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(rcp->versnum == versnum) &&
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(!strcmp(rcp->host, host)) &&
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(!strcmp(rcp->nettype, nettype)))) {
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int fd;
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rcp->valid = 0;
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if (rcp->client)
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CLNT_DESTROY(rcp->client);
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/*
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* Using the first successful transport for that type
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*/
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rcp->client = clnt_create(host, prognum, versnum, nettype);
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rcp->pid = getpid();
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if (rcp->client == NULL) {
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return (rpc_createerr.cf_stat);
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}
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/*
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* Set time outs for connectionless case. Do it
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* unconditionally. Faster than doing a t_getinfo()
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* and then doing the right thing.
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*/
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timeout.tv_usec = 0;
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timeout.tv_sec = 5;
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(void) CLNT_CONTROL(rcp->client,
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CLSET_RETRY_TIMEOUT, (char *)(void *)&timeout);
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if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd))
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_fcntl(fd, F_SETFD, 1); /* make it "close on exec" */
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rcp->prognum = prognum;
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rcp->versnum = versnum;
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if ((strlen(host) < (size_t)MAXHOSTNAMELEN) &&
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(strlen(nettype) < (size_t)NETIDLEN)) {
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(void) strcpy(rcp->host, host);
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(void) strcpy(rcp->nettype, nettype);
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rcp->valid = 1;
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} else {
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rcp->valid = 0;
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}
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} /* else reuse old client */
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tottimeout.tv_sec = 25;
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tottimeout.tv_usec = 0;
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/*LINTED const castaway*/
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clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *) in,
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outproc, out, tottimeout);
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/*
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* if call failed, empty cache
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*/
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if (clnt_stat != RPC_SUCCESS)
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rcp->valid = 0;
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return (clnt_stat);
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}
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