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 2006 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 29 /* All Rights Reserved */ 30 /* 31 * Portions of this source code were derived from Berkeley 32 * 4.3 BSD under license from the Regents of the University of 33 * California. 34 */ 35 36 #pragma ident "%Z%%M% %I% %E% SMI" 37 38 /* 39 * Simplified front end to client rpc. 40 */ 41 42 #include "mt.h" 43 #include "rpc_mt.h" 44 #include <stdio.h> 45 #include <errno.h> 46 #include <rpc/rpc.h> 47 #include <string.h> 48 #include <sys/param.h> 49 #include <stdlib.h> 50 #include <unistd.h> 51 52 #ifndef MAXHOSTNAMELEN 53 #define MAXHOSTNAMELEN 64 54 #endif 55 56 #ifndef NETIDLEN 57 #define NETIDLEN 32 58 #endif 59 60 struct rpc_call_private { 61 int valid; /* Is this entry valid ? */ 62 CLIENT *client; /* Client handle */ 63 pid_t pid; /* process-id at moment of creation */ 64 rpcprog_t prognum; /* Program */ 65 rpcvers_t versnum; /* version */ 66 char host[MAXHOSTNAMELEN]; /* Servers host */ 67 char nettype[NETIDLEN]; /* Network type */ 68 }; 69 70 static void 71 rpc_call_destroy(void *vp) 72 { 73 struct rpc_call_private *rcp = (struct rpc_call_private *)vp; 74 75 if (rcp) { 76 if (rcp->client) 77 CLNT_DESTROY(rcp->client); 78 free(rcp); 79 } 80 } 81 82 /* 83 * This is the simplified interface to the client rpc layer. 84 * The client handle is not destroyed here and is reused for 85 * the future calls to same prog, vers, host and nettype combination. 86 * 87 * The total time available is 25 seconds. 88 */ 89 enum clnt_stat 90 rpc_call(const char *host, const rpcprog_t prognum, const rpcvers_t versnum, 91 const rpcproc_t procnum, const xdrproc_t inproc, const char *in, 92 const xdrproc_t outproc, char *out, const char *netclass) 93 { 94 struct rpc_call_private *rcp; 95 enum clnt_stat clnt_stat; 96 struct timeval timeout, tottimeout; 97 static pthread_key_t rpc_call_key; 98 char nettype_array[NETIDLEN]; 99 char *nettype = &nettype_array[0]; 100 101 if (netclass == NULL) 102 nettype = NULL; 103 else { 104 size_t len = strlen(netclass); 105 if (len >= sizeof (nettype_array)) { 106 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 107 return (rpc_createerr.cf_stat); 108 } 109 (void) strcpy(nettype, netclass); 110 } 111 112 rcp = thr_get_storage(&rpc_call_key, sizeof (*rcp), rpc_call_destroy); 113 if (rcp == NULL) { 114 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 115 rpc_createerr.cf_error.re_errno = errno; 116 return (rpc_createerr.cf_stat); 117 } 118 119 if ((nettype == NULL) || (nettype[0] == NULL)) 120 nettype = "netpath"; 121 if (!(rcp->valid && 122 rcp->pid == getpid() && 123 rcp->prognum == prognum && 124 rcp->versnum == versnum && 125 strcmp(rcp->host, host) == 0 && 126 strcmp(rcp->nettype, nettype) == 0)) { 127 int fd; 128 129 rcp->valid = 0; 130 if (rcp->client) 131 CLNT_DESTROY(rcp->client); 132 /* 133 * Using the first successful transport for that type 134 */ 135 rcp->client = clnt_create(host, prognum, versnum, nettype); 136 rcp->pid = getpid(); 137 if (rcp->client == NULL) 138 return (rpc_createerr.cf_stat); 139 /* 140 * Set time outs for connectionless case. Do it 141 * unconditionally. Faster than doing a t_getinfo() 142 * and then doing the right thing. 143 */ 144 timeout.tv_usec = 0; 145 timeout.tv_sec = 5; 146 (void) CLNT_CONTROL(rcp->client, 147 CLSET_RETRY_TIMEOUT, (char *)&timeout); 148 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)&fd)) 149 (void) fcntl(fd, F_SETFD, 1); /* close on exec */ 150 rcp->prognum = prognum; 151 rcp->versnum = versnum; 152 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) && 153 (strlen(nettype) < (size_t)NETIDLEN)) { 154 (void) strcpy(rcp->host, host); 155 (void) strcpy(rcp->nettype, nettype); 156 rcp->valid = 1; 157 } else { 158 rcp->valid = 0; 159 } 160 } /* else reuse old client */ 161 tottimeout.tv_sec = 25; 162 tottimeout.tv_usec = 0; 163 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *)in, 164 outproc, out, tottimeout); 165 /* 166 * if call failed, empty cache 167 */ 168 if (clnt_stat != RPC_SUCCESS) 169 rcp->valid = 0; 170 return (clnt_stat); 171 } 172