1 /* $NetBSD: clnt_simple.c,v 1.21 2000/07/06 03:10:34 christos Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-3-Clause 5 * 6 * Copyright (c) 2009, Sun Microsystems, Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions are met: 11 * - Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * - Neither the name of Sun Microsystems, Inc. nor the names of its 17 * contributors may be used to endorse or promote products derived 18 * from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 /* 33 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 34 */ 35 36 #if defined(LIBC_SCCS) && !defined(lint) 37 static char *sccsid2 = "from: @(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro"; 38 static char *sccsid = "from: @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC"; 39 #endif 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 /* 44 * clnt_simple.c 45 * Simplified front end to client rpc. 46 * 47 */ 48 49 #include "namespace.h" 50 #include "reentrant.h" 51 #include <sys/param.h> 52 #include <stdio.h> 53 #include <errno.h> 54 #include <rpc/rpc.h> 55 #include <string.h> 56 #include <stdlib.h> 57 #include <fcntl.h> 58 #include <unistd.h> 59 #include "un-namespace.h" 60 #include "mt_misc.h" 61 62 #ifndef MAXHOSTNAMELEN 63 #define MAXHOSTNAMELEN 64 64 #endif 65 66 #ifndef NETIDLEN 67 #define NETIDLEN 32 68 #endif 69 70 struct rpc_call_private { 71 int valid; /* Is this entry valid ? */ 72 CLIENT *client; /* Client handle */ 73 pid_t pid; /* process-id at moment of creation */ 74 rpcprog_t prognum; /* Program */ 75 rpcvers_t versnum; /* Version */ 76 char host[MAXHOSTNAMELEN]; /* Servers host */ 77 char nettype[NETIDLEN]; /* Network type */ 78 }; 79 static struct rpc_call_private *rpc_call_private_main; 80 static thread_key_t rpc_call_key; 81 static once_t rpc_call_once = ONCE_INITIALIZER; 82 static int rpc_call_key_error; 83 84 static void rpc_call_key_init(void); 85 static void rpc_call_destroy(void *); 86 87 static void 88 rpc_call_destroy(void *vp) 89 { 90 struct rpc_call_private *rcp = (struct rpc_call_private *)vp; 91 92 if (rcp) { 93 if (rcp->client) 94 CLNT_DESTROY(rcp->client); 95 free(rcp); 96 } 97 } 98 99 static void 100 rpc_call_key_init(void) 101 { 102 103 rpc_call_key_error = thr_keycreate(&rpc_call_key, rpc_call_destroy); 104 } 105 106 /* 107 * This is the simplified interface to the client rpc layer. 108 * The client handle is not destroyed here and is reused for 109 * the future calls to same prog, vers, host and nettype combination. 110 * 111 * The total time available is 25 seconds. 112 * 113 * host - host name 114 * prognum - program number 115 * versnum - version number 116 * procnum - procedure number 117 * inproc, outproc - in/out XDR procedures 118 * in, out - recv/send data 119 * nettype - nettype 120 */ 121 enum clnt_stat 122 rpc_call(const char *host, const rpcprog_t prognum, const rpcvers_t versnum, 123 const rpcproc_t procnum, const xdrproc_t inproc, const char *in, 124 const xdrproc_t outproc, char *out, const char *nettype) 125 { 126 struct rpc_call_private *rcp = (struct rpc_call_private *) 0; 127 enum clnt_stat clnt_stat; 128 struct timeval timeout, tottimeout; 129 int main_thread = 1; 130 131 if ((main_thread = thr_main())) { 132 rcp = rpc_call_private_main; 133 } else { 134 if (thr_once(&rpc_call_once, rpc_call_key_init) != 0 || 135 rpc_call_key_error != 0) { 136 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 137 rpc_createerr.cf_error.re_errno = rpc_call_key_error; 138 return (rpc_createerr.cf_stat); 139 } 140 rcp = (struct rpc_call_private *)thr_getspecific(rpc_call_key); 141 } 142 if (rcp == NULL) { 143 rcp = malloc(sizeof (*rcp)); 144 if (rcp == NULL) { 145 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 146 rpc_createerr.cf_error.re_errno = errno; 147 return (rpc_createerr.cf_stat); 148 } 149 if (main_thread) 150 rpc_call_private_main = rcp; 151 else 152 thr_setspecific(rpc_call_key, (void *) rcp); 153 rcp->valid = 0; 154 rcp->client = NULL; 155 } 156 if ((nettype == NULL) || (nettype[0] == 0)) 157 nettype = "netpath"; 158 if (!(rcp->valid && rcp->pid == getpid() && 159 (rcp->prognum == prognum) && 160 (rcp->versnum == versnum) && 161 (!strcmp(rcp->host, host)) && 162 (!strcmp(rcp->nettype, nettype)))) { 163 int fd; 164 165 rcp->valid = 0; 166 if (rcp->client) 167 CLNT_DESTROY(rcp->client); 168 /* 169 * Using the first successful transport for that type 170 */ 171 rcp->client = clnt_create(host, prognum, versnum, nettype); 172 rcp->pid = getpid(); 173 if (rcp->client == NULL) { 174 return (rpc_createerr.cf_stat); 175 } 176 /* 177 * Set time outs for connectionless case. Do it 178 * unconditionally. Faster than doing a t_getinfo() 179 * and then doing the right thing. 180 */ 181 timeout.tv_usec = 0; 182 timeout.tv_sec = 5; 183 (void) CLNT_CONTROL(rcp->client, 184 CLSET_RETRY_TIMEOUT, (char *)(void *)&timeout); 185 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd)) 186 _fcntl(fd, F_SETFD, 1); /* make it "close on exec" */ 187 rcp->prognum = prognum; 188 rcp->versnum = versnum; 189 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) && 190 (strlen(nettype) < (size_t)NETIDLEN)) { 191 (void) strcpy(rcp->host, host); 192 (void) strcpy(rcp->nettype, nettype); 193 rcp->valid = 1; 194 } else { 195 rcp->valid = 0; 196 } 197 } /* else reuse old client */ 198 tottimeout.tv_sec = 25; 199 tottimeout.tv_usec = 0; 200 /*LINTED const castaway*/ 201 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *) in, 202 outproc, out, tottimeout); 203 /* 204 * if call failed, empty cache 205 */ 206 if (clnt_stat != RPC_SUCCESS) 207 rcp->valid = 0; 208 return (clnt_stat); 209 } 210