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 /* 41 * clnt_simple.c 42 * Simplified front end to client rpc. 43 * 44 */ 45 46 #include "namespace.h" 47 #include "reentrant.h" 48 #include <sys/param.h> 49 #include <stdio.h> 50 #include <errno.h> 51 #include <rpc/rpc.h> 52 #include <string.h> 53 #include <stdlib.h> 54 #include <fcntl.h> 55 #include <unistd.h> 56 #include "un-namespace.h" 57 #include "mt_misc.h" 58 59 #ifndef MAXHOSTNAMELEN 60 #define MAXHOSTNAMELEN 64 61 #endif 62 63 #ifndef NETIDLEN 64 #define NETIDLEN 32 65 #endif 66 67 struct rpc_call_private { 68 int valid; /* Is this entry valid ? */ 69 CLIENT *client; /* Client handle */ 70 pid_t pid; /* process-id at moment of creation */ 71 rpcprog_t prognum; /* Program */ 72 rpcvers_t versnum; /* Version */ 73 char host[MAXHOSTNAMELEN]; /* Servers host */ 74 char nettype[NETIDLEN]; /* Network type */ 75 }; 76 static struct rpc_call_private *rpc_call_private_main; 77 static thread_key_t rpc_call_key; 78 static once_t rpc_call_once = ONCE_INITIALIZER; 79 static int rpc_call_key_error; 80 81 static void rpc_call_key_init(void); 82 static void rpc_call_destroy(void *); 83 84 static void 85 rpc_call_destroy(void *vp) 86 { 87 struct rpc_call_private *rcp = (struct rpc_call_private *)vp; 88 89 if (rcp) { 90 if (rcp->client) 91 CLNT_DESTROY(rcp->client); 92 free(rcp); 93 } 94 } 95 96 static void 97 rpc_call_key_init(void) 98 { 99 100 rpc_call_key_error = thr_keycreate(&rpc_call_key, rpc_call_destroy); 101 } 102 103 /* 104 * This is the simplified interface to the client rpc layer. 105 * The client handle is not destroyed here and is reused for 106 * the future calls to same prog, vers, host and nettype combination. 107 * 108 * The total time available is 25 seconds. 109 * 110 * host - host name 111 * prognum - program number 112 * versnum - version number 113 * procnum - procedure number 114 * inproc, outproc - in/out XDR procedures 115 * in, out - recv/send data 116 * nettype - nettype 117 */ 118 enum clnt_stat 119 rpc_call(const char *host, const rpcprog_t prognum, const rpcvers_t versnum, 120 const rpcproc_t procnum, const xdrproc_t inproc, const char *in, 121 const xdrproc_t outproc, char *out, const char *nettype) 122 { 123 struct rpc_call_private *rcp = (struct rpc_call_private *) 0; 124 enum clnt_stat clnt_stat; 125 struct timeval timeout, tottimeout; 126 int main_thread = 1; 127 128 if ((main_thread = thr_main())) { 129 rcp = rpc_call_private_main; 130 } else { 131 if (thr_once(&rpc_call_once, rpc_call_key_init) != 0 || 132 rpc_call_key_error != 0) { 133 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 134 rpc_createerr.cf_error.re_errno = rpc_call_key_error; 135 return (rpc_createerr.cf_stat); 136 } 137 rcp = (struct rpc_call_private *)thr_getspecific(rpc_call_key); 138 } 139 if (rcp == NULL) { 140 rcp = malloc(sizeof (*rcp)); 141 if (rcp == NULL) { 142 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 143 rpc_createerr.cf_error.re_errno = errno; 144 return (rpc_createerr.cf_stat); 145 } 146 if (main_thread) 147 rpc_call_private_main = rcp; 148 else 149 thr_setspecific(rpc_call_key, (void *) rcp); 150 rcp->valid = 0; 151 rcp->client = NULL; 152 } 153 if ((nettype == NULL) || (nettype[0] == 0)) 154 nettype = "netpath"; 155 if (!(rcp->valid && rcp->pid == getpid() && 156 (rcp->prognum == prognum) && 157 (rcp->versnum == versnum) && 158 (!strcmp(rcp->host, host)) && 159 (!strcmp(rcp->nettype, nettype)))) { 160 int fd; 161 162 rcp->valid = 0; 163 if (rcp->client) 164 CLNT_DESTROY(rcp->client); 165 /* 166 * Using the first successful transport for that type 167 */ 168 rcp->client = clnt_create(host, prognum, versnum, nettype); 169 rcp->pid = getpid(); 170 if (rcp->client == NULL) { 171 return (rpc_createerr.cf_stat); 172 } 173 /* 174 * Set time outs for connectionless case. Do it 175 * unconditionally. Faster than doing a t_getinfo() 176 * and then doing the right thing. 177 */ 178 timeout.tv_usec = 0; 179 timeout.tv_sec = 5; 180 (void) CLNT_CONTROL(rcp->client, 181 CLSET_RETRY_TIMEOUT, (char *)(void *)&timeout); 182 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd)) 183 _fcntl(fd, F_SETFD, 1); /* make it "close on exec" */ 184 rcp->prognum = prognum; 185 rcp->versnum = versnum; 186 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) && 187 (strlen(nettype) < (size_t)NETIDLEN)) { 188 (void) strcpy(rcp->host, host); 189 (void) strcpy(rcp->nettype, nettype); 190 rcp->valid = 1; 191 } else { 192 rcp->valid = 0; 193 } 194 } /* else reuse old client */ 195 tottimeout.tv_sec = 25; 196 tottimeout.tv_usec = 0; 197 /*LINTED const castaway*/ 198 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *) in, 199 outproc, out, tottimeout); 200 /* 201 * if call failed, empty cache 202 */ 203 if (clnt_stat != RPC_SUCCESS) 204 rcp->valid = 0; 205 return (clnt_stat); 206 } 207