clnt_simple.c revision 261046
1/* $NetBSD: clnt_simple.c,v 1.21 2000/07/06 03:10:34 christos Exp $ */ 2 3/*- 4 * Copyright (c) 2009, Sun Microsystems, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * - Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * - Neither the name of Sun Microsystems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30/* 31 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 32 */ 33 34#if defined(LIBC_SCCS) && !defined(lint) 35static char *sccsid2 = "from: @(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro"; 36static char *sccsid = "from: @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC"; 37#endif 38#include <sys/cdefs.h> 39__FBSDID("$FreeBSD: stable/10/lib/libc/rpc/clnt_simple.c 261046 2014-01-22 23:45:27Z mav $"); 40 41/* 42 * clnt_simple.c 43 * Simplified front end to client rpc. 44 * 45 */ 46 47#include "namespace.h" 48#include "reentrant.h" 49#include <sys/param.h> 50#include <stdio.h> 51#include <errno.h> 52#include <rpc/rpc.h> 53#include <string.h> 54#include <stdlib.h> 55#include <fcntl.h> 56#include <unistd.h> 57#include "un-namespace.h" 58#include "mt_misc.h" 59 60#ifndef MAXHOSTNAMELEN 61#define MAXHOSTNAMELEN 64 62#endif 63 64#ifndef NETIDLEN 65#define NETIDLEN 32 66#endif 67 68struct rpc_call_private { 69 int valid; /* Is this entry valid ? */ 70 CLIENT *client; /* Client handle */ 71 pid_t pid; /* process-id at moment of creation */ 72 rpcprog_t prognum; /* Program */ 73 rpcvers_t versnum; /* Version */ 74 char host[MAXHOSTNAMELEN]; /* Servers host */ 75 char nettype[NETIDLEN]; /* Network type */ 76}; 77static struct rpc_call_private *rpc_call_private_main; 78static thread_key_t rpc_call_key; 79static once_t rpc_call_once = ONCE_INITIALIZER; 80static int rpc_call_key_error; 81 82static void rpc_call_key_init(void); 83static void rpc_call_destroy(void *); 84 85static void 86rpc_call_destroy(void *vp) 87{ 88 struct rpc_call_private *rcp = (struct rpc_call_private *)vp; 89 90 if (rcp) { 91 if (rcp->client) 92 CLNT_DESTROY(rcp->client); 93 free(rcp); 94 } 95} 96 97static void 98rpc_call_key_init(void) 99{ 100 101 rpc_call_key_error = thr_keycreate(&rpc_call_key, rpc_call_destroy); 102} 103 104/* 105 * This is the simplified interface to the client rpc layer. 106 * The client handle is not destroyed here and is reused for 107 * the future calls to same prog, vers, host and nettype combination. 108 * 109 * The total time available is 25 seconds. 110 */ 111enum clnt_stat 112rpc_call(host, prognum, versnum, procnum, inproc, in, outproc, out, nettype) 113 const char *host; /* host name */ 114 rpcprog_t prognum; /* program number */ 115 rpcvers_t versnum; /* version number */ 116 rpcproc_t procnum; /* procedure number */ 117 xdrproc_t inproc, outproc; /* in/out XDR procedures */ 118 const char *in; 119 char *out; /* recv/send data */ 120 const char *nettype; /* nettype */ 121{ 122 struct rpc_call_private *rcp = (struct rpc_call_private *) 0; 123 enum clnt_stat clnt_stat; 124 struct timeval timeout, tottimeout; 125 int main_thread = 1; 126 127 if ((main_thread = thr_main())) { 128 rcp = rpc_call_private_main; 129 } else { 130 if (thr_once(&rpc_call_once, rpc_call_key_init) != 0 || 131 rpc_call_key_error != 0) { 132 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 133 rpc_createerr.cf_error.re_errno = rpc_call_key_error; 134 return (rpc_createerr.cf_stat); 135 } 136 rcp = (struct rpc_call_private *)thr_getspecific(rpc_call_key); 137 } 138 if (rcp == NULL) { 139 rcp = malloc(sizeof (*rcp)); 140 if (rcp == NULL) { 141 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 142 rpc_createerr.cf_error.re_errno = errno; 143 return (rpc_createerr.cf_stat); 144 } 145 if (main_thread) 146 rpc_call_private_main = rcp; 147 else 148 thr_setspecific(rpc_call_key, (void *) rcp); 149 rcp->valid = 0; 150 rcp->client = NULL; 151 } 152 if ((nettype == NULL) || (nettype[0] == 0)) 153 nettype = "netpath"; 154 if (!(rcp->valid && rcp->pid == getpid() && 155 (rcp->prognum == prognum) && 156 (rcp->versnum == versnum) && 157 (!strcmp(rcp->host, host)) && 158 (!strcmp(rcp->nettype, nettype)))) { 159 int fd; 160 161 rcp->valid = 0; 162 if (rcp->client) 163 CLNT_DESTROY(rcp->client); 164 /* 165 * Using the first successful transport for that type 166 */ 167 rcp->client = clnt_create(host, prognum, versnum, nettype); 168 rcp->pid = getpid(); 169 if (rcp->client == NULL) { 170 return (rpc_createerr.cf_stat); 171 } 172 /* 173 * Set time outs for connectionless case. Do it 174 * unconditionally. Faster than doing a t_getinfo() 175 * and then doing the right thing. 176 */ 177 timeout.tv_usec = 0; 178 timeout.tv_sec = 5; 179 (void) CLNT_CONTROL(rcp->client, 180 CLSET_RETRY_TIMEOUT, (char *)(void *)&timeout); 181 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd)) 182 _fcntl(fd, F_SETFD, 1); /* make it "close on exec" */ 183 rcp->prognum = prognum; 184 rcp->versnum = versnum; 185 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) && 186 (strlen(nettype) < (size_t)NETIDLEN)) { 187 (void) strcpy(rcp->host, host); 188 (void) strcpy(rcp->nettype, nettype); 189 rcp->valid = 1; 190 } else { 191 rcp->valid = 0; 192 } 193 } /* else reuse old client */ 194 tottimeout.tv_sec = 25; 195 tottimeout.tv_usec = 0; 196 /*LINTED const castaway*/ 197 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *) in, 198 outproc, out, tottimeout); 199 /* 200 * if call failed, empty cache 201 */ 202 if (clnt_stat != RPC_SUCCESS) 203 rcp->valid = 0; 204 return (clnt_stat); 205} 206