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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 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 /* 36 * Simplified front end to client rpc. 37 */ 38 39 #include "mt.h" 40 #include "rpc_mt.h" 41 #include <stdio.h> 42 #include <errno.h> 43 #include <rpc/rpc.h> 44 #include <string.h> 45 #include <sys/param.h> 46 #include <stdlib.h> 47 #include <unistd.h> 48 49 #ifndef MAXHOSTNAMELEN 50 #define MAXHOSTNAMELEN 64 51 #endif 52 53 #ifndef NETIDLEN 54 #define NETIDLEN 32 55 #endif 56 57 struct rpc_call_private { 58 int valid; /* Is this entry valid ? */ 59 CLIENT *client; /* Client handle */ 60 pid_t pid; /* process-id at moment of creation */ 61 rpcprog_t prognum; /* Program */ 62 rpcvers_t versnum; /* version */ 63 char host[MAXHOSTNAMELEN]; /* Servers host */ 64 char nettype[NETIDLEN]; /* Network type */ 65 }; 66 67 static void 68 rpc_call_destroy(void *vp) 69 { 70 struct rpc_call_private *rcp = (struct rpc_call_private *)vp; 71 72 if (rcp) { 73 if (rcp->client) 74 CLNT_DESTROY(rcp->client); 75 free(rcp); 76 } 77 } 78 79 /* 80 * This is the simplified interface to the client rpc layer. 81 * The client handle is not destroyed here and is reused for 82 * the future calls to same prog, vers, host and nettype combination. 83 * 84 * The total time available is 25 seconds. 85 */ 86 enum clnt_stat 87 rpc_call(const char *host, const rpcprog_t prognum, const rpcvers_t versnum, 88 const rpcproc_t procnum, const xdrproc_t inproc, const char *in, 89 const xdrproc_t outproc, char *out, const char *netclass) 90 { 91 struct rpc_call_private *rcp; 92 enum clnt_stat clnt_stat; 93 struct timeval timeout, tottimeout; 94 static pthread_key_t rpc_call_key = PTHREAD_ONCE_KEY_NP; 95 char nettype_array[NETIDLEN]; 96 char *nettype = &nettype_array[0]; 97 98 if (netclass == NULL) 99 nettype = NULL; 100 else { 101 size_t len = strlen(netclass); 102 if (len >= sizeof (nettype_array)) { 103 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; 104 return (rpc_createerr.cf_stat); 105 } 106 (void) strcpy(nettype, netclass); 107 } 108 109 rcp = thr_get_storage(&rpc_call_key, sizeof (*rcp), rpc_call_destroy); 110 if (rcp == NULL) { 111 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 112 rpc_createerr.cf_error.re_errno = errno; 113 return (rpc_createerr.cf_stat); 114 } 115 116 if ((nettype == NULL) || (nettype[0] == '\0')) 117 nettype = "netpath"; 118 if (!(rcp->valid && 119 rcp->pid == getpid() && 120 rcp->prognum == prognum && 121 rcp->versnum == versnum && 122 strcmp(rcp->host, host) == 0 && 123 strcmp(rcp->nettype, nettype) == 0)) { 124 int fd; 125 126 rcp->valid = 0; 127 if (rcp->client) 128 CLNT_DESTROY(rcp->client); 129 /* 130 * Using the first successful transport for that type 131 */ 132 rcp->client = clnt_create(host, prognum, versnum, nettype); 133 rcp->pid = getpid(); 134 if (rcp->client == NULL) 135 return (rpc_createerr.cf_stat); 136 /* 137 * Set time outs for connectionless case. Do it 138 * unconditionally. Faster than doing a t_getinfo() 139 * and then doing the right thing. 140 */ 141 timeout.tv_usec = 0; 142 timeout.tv_sec = 5; 143 (void) CLNT_CONTROL(rcp->client, 144 CLSET_RETRY_TIMEOUT, (char *)&timeout); 145 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)&fd)) 146 (void) fcntl(fd, F_SETFD, 1); /* close on exec */ 147 rcp->prognum = prognum; 148 rcp->versnum = versnum; 149 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) && 150 (strlen(nettype) < (size_t)NETIDLEN)) { 151 (void) strcpy(rcp->host, host); 152 (void) strcpy(rcp->nettype, nettype); 153 rcp->valid = 1; 154 } else { 155 rcp->valid = 0; 156 } 157 } /* else reuse old client */ 158 tottimeout.tv_sec = 25; 159 tottimeout.tv_usec = 0; 160 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *)in, 161 outproc, out, tottimeout); 162 /* 163 * if call failed, empty cache 164 */ 165 if (clnt_stat != RPC_SUCCESS) 166 rcp->valid = 0; 167 return (clnt_stat); 168 } 169