/* $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 /* * clnt_simple.c * Simplified front end to client rpc. * */ #include "namespace.h" #include "reentrant.h" #include #include #include #include #include #include #include #include #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); }