1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 23 /* 24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 /* 30 * Portions of this source code were derived from Berkeley 31 * 4.3 BSD under license from the Regents of the University of 32 * California. 33 */ 34 35 #pragma ident "%Z%%M% %I% %E% SMI" 36 37 /* 38 * clnt_simple.c 39 * Simplified front end to client rpc. 40 * 41 */ 42 43 #include "mt.h" 44 #include "rpc_mt.h" 45 #include <stdio.h> 46 #include <errno.h> 47 #include <rpc/rpc.h> 48 #include <string.h> 49 #include <sys/param.h> 50 #include <stdlib.h> 51 #include <unistd.h> 52 53 #ifndef MAXHOSTNAMELEN 54 #define MAXHOSTNAMELEN 64 55 #endif 56 57 #ifndef NETIDLEN 58 #define NETIDLEN 32 59 #endif 60 61 struct rpc_call_private { 62 int valid; /* Is this entry valid ? */ 63 CLIENT *client; /* Client handle */ 64 pid_t pid; /* process-id at moment of creation */ 65 rpcprog_t prognum; /* Program */ 66 rpcvers_t versnum; /* version */ 67 char host[MAXHOSTNAMELEN]; /* Servers host */ 68 char nettype[NETIDLEN]; /* Network type */ 69 }; 70 71 static void 72 rpc_call_destroy(void *vp) 73 { 74 struct rpc_call_private *rcp = (struct rpc_call_private *)vp; 75 76 if (rcp) { 77 if (rcp->client) 78 CLNT_DESTROY(rcp->client); 79 free(rcp); 80 } 81 } 82 83 /* 84 * This is the simplified interface to the client rpc layer. 85 * The client handle is not destroyed here and is reused for 86 * the future calls to same prog, vers, host and nettype combination. 87 * 88 * The total time available is 25 seconds. 89 */ 90 enum clnt_stat 91 rpc_call(const char *host, const rpcprog_t prognum, const rpcvers_t versnum, 92 const rpcproc_t procnum, const xdrproc_t inproc, const char *in, 93 const xdrproc_t outproc, char *out, const char *netclass) 94 { 95 struct rpc_call_private *rcp; 96 enum clnt_stat clnt_stat; 97 struct timeval timeout, tottimeout; 98 static pthread_key_t rpc_call_key; 99 char nettype_array[NETIDLEN]; 100 char *nettype = &nettype_array[0]; 101 102 if (netclass == NULL) 103 nettype = NULL; 104 else { 105 size_t len = strlen(netclass); 106 if (len >= sizeof (nettype_array)) { 107 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 108 return (rpc_createerr.cf_stat); 109 } 110 (void) strcpy(nettype, netclass); 111 } 112 113 rcp = thr_get_storage(&rpc_call_key, sizeof (*rcp), rpc_call_destroy); 114 if (rcp == NULL) { 115 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 116 rpc_createerr.cf_error.re_errno = errno; 117 return (rpc_createerr.cf_stat); 118 } 119 120 if ((nettype == NULL) || (nettype[0] == NULL)) 121 nettype = "netpath"; 122 if (!(rcp->valid && 123 rcp->pid == getpid() && 124 rcp->prognum == prognum && 125 rcp->versnum == versnum && 126 strcmp(rcp->host, host) == 0 && 127 strcmp(rcp->nettype, nettype) == 0)) { 128 int fd; 129 130 rcp->valid = 0; 131 if (rcp->client) 132 CLNT_DESTROY(rcp->client); 133 /* 134 * Using the first successful transport for that type 135 */ 136 rcp->client = clnt_create(host, prognum, versnum, nettype); 137 rcp->pid = getpid(); 138 if (rcp->client == NULL) 139 return (rpc_createerr.cf_stat); 140 /* 141 * Set time outs for connectionless case. Do it 142 * unconditionally. Faster than doing a t_getinfo() 143 * and then doing the right thing. 144 */ 145 timeout.tv_usec = 0; 146 timeout.tv_sec = 5; 147 (void) CLNT_CONTROL(rcp->client, 148 CLSET_RETRY_TIMEOUT, (char *)&timeout); 149 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)&fd)) 150 _fcntl(fd, F_SETFD, 1); /* make it "close on exec" */ 151 rcp->prognum = prognum; 152 rcp->versnum = versnum; 153 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) && 154 (strlen(nettype) < (size_t)NETIDLEN)) { 155 (void) strcpy(rcp->host, host); 156 (void) strcpy(rcp->nettype, nettype); 157 rcp->valid = 1; 158 } else { 159 rcp->valid = 0; 160 } 161 } /* else reuse old client */ 162 tottimeout.tv_sec = 25; 163 tottimeout.tv_usec = 0; 164 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *)in, 165 outproc, out, tottimeout); 166 /* 167 * if call failed, empty cache 168 */ 169 if (clnt_stat != RPC_SUCCESS) 170 rcp->valid = 0; 171 return (clnt_stat); 172 } 173