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 /* 37 * clnt_simple.c 38 * Simplified front end to client rpc. 39 * 40 */ 41 42 #include "namespace.h" 43 #include "reentrant.h" 44 #include <sys/param.h> 45 #include <stdio.h> 46 #include <errno.h> 47 #include <rpc/rpc.h> 48 #include <string.h> 49 #include <stdlib.h> 50 #include <fcntl.h> 51 #include <unistd.h> 52 #include "un-namespace.h" 53 #include "mt_misc.h" 54 55 #ifndef MAXHOSTNAMELEN 56 #define MAXHOSTNAMELEN 64 57 #endif 58 59 #ifndef NETIDLEN 60 #define NETIDLEN 32 61 #endif 62 63 struct rpc_call_private { 64 int valid; /* Is this entry valid ? */ 65 CLIENT *client; /* Client handle */ 66 pid_t pid; /* process-id at moment of creation */ 67 rpcprog_t prognum; /* Program */ 68 rpcvers_t versnum; /* Version */ 69 char host[MAXHOSTNAMELEN]; /* Servers host */ 70 char nettype[NETIDLEN]; /* Network type */ 71 }; 72 static struct rpc_call_private *rpc_call_private_main; 73 static thread_key_t rpc_call_key; 74 static once_t rpc_call_once = ONCE_INITIALIZER; 75 static int rpc_call_key_error; 76 77 static void rpc_call_key_init(void); 78 static void rpc_call_destroy(void *); 79 80 static void 81 rpc_call_destroy(void *vp) 82 { 83 struct rpc_call_private *rcp = (struct rpc_call_private *)vp; 84 85 if (rcp) { 86 if (rcp->client) 87 CLNT_DESTROY(rcp->client); 88 free(rcp); 89 } 90 } 91 92 static void 93 rpc_call_key_init(void) 94 { 95 96 rpc_call_key_error = thr_keycreate(&rpc_call_key, rpc_call_destroy); 97 } 98 99 /* 100 * This is the simplified interface to the client rpc layer. 101 * The client handle is not destroyed here and is reused for 102 * the future calls to same prog, vers, host and nettype combination. 103 * 104 * The total time available is 25 seconds. 105 * 106 * host - host name 107 * prognum - program number 108 * versnum - version number 109 * procnum - procedure number 110 * inproc, outproc - in/out XDR procedures 111 * in, out - recv/send data 112 * nettype - nettype 113 */ 114 enum clnt_stat 115 rpc_call(const char *host, const rpcprog_t prognum, const rpcvers_t versnum, 116 const rpcproc_t procnum, const xdrproc_t inproc, const char *in, 117 const xdrproc_t outproc, char *out, const char *nettype) 118 { 119 struct rpc_call_private *rcp = (struct rpc_call_private *) 0; 120 enum clnt_stat clnt_stat; 121 struct timeval timeout, tottimeout; 122 int main_thread = 1; 123 124 if ((main_thread = thr_main())) { 125 rcp = rpc_call_private_main; 126 } else { 127 if (thr_once(&rpc_call_once, rpc_call_key_init) != 0 || 128 rpc_call_key_error != 0) { 129 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 130 rpc_createerr.cf_error.re_errno = rpc_call_key_error; 131 return (rpc_createerr.cf_stat); 132 } 133 rcp = (struct rpc_call_private *)thr_getspecific(rpc_call_key); 134 } 135 if (rcp == NULL) { 136 rcp = malloc(sizeof (*rcp)); 137 if (rcp == NULL) { 138 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 139 rpc_createerr.cf_error.re_errno = errno; 140 return (rpc_createerr.cf_stat); 141 } 142 if (main_thread) 143 rpc_call_private_main = rcp; 144 else 145 thr_setspecific(rpc_call_key, (void *) rcp); 146 rcp->valid = 0; 147 rcp->client = NULL; 148 } 149 if ((nettype == NULL) || (nettype[0] == 0)) 150 nettype = "netpath"; 151 if (!(rcp->valid && rcp->pid == getpid() && 152 (rcp->prognum == prognum) && 153 (rcp->versnum == versnum) && 154 (!strcmp(rcp->host, host)) && 155 (!strcmp(rcp->nettype, nettype)))) { 156 int fd; 157 158 rcp->valid = 0; 159 if (rcp->client) 160 CLNT_DESTROY(rcp->client); 161 /* 162 * Using the first successful transport for that type 163 */ 164 rcp->client = clnt_create(host, prognum, versnum, nettype); 165 rcp->pid = getpid(); 166 if (rcp->client == NULL) { 167 return (rpc_createerr.cf_stat); 168 } 169 /* 170 * Set time outs for connectionless case. Do it 171 * unconditionally. Faster than doing a t_getinfo() 172 * and then doing the right thing. 173 */ 174 timeout.tv_usec = 0; 175 timeout.tv_sec = 5; 176 (void) CLNT_CONTROL(rcp->client, 177 CLSET_RETRY_TIMEOUT, (char *)(void *)&timeout); 178 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd)) 179 _fcntl(fd, F_SETFD, 1); /* make it "close on exec" */ 180 rcp->prognum = prognum; 181 rcp->versnum = versnum; 182 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) && 183 (strlen(nettype) < (size_t)NETIDLEN)) { 184 (void) strcpy(rcp->host, host); 185 (void) strcpy(rcp->nettype, nettype); 186 rcp->valid = 1; 187 } else { 188 rcp->valid = 0; 189 } 190 } /* else reuse old client */ 191 tottimeout.tv_sec = 25; 192 tottimeout.tv_usec = 0; 193 /*LINTED const castaway*/ 194 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *) in, 195 outproc, out, tottimeout); 196 /* 197 * if call failed, empty cache 198 */ 199 if (clnt_stat != RPC_SUCCESS) 200 rcp->valid = 0; 201 return (clnt_stat); 202 } 203