1 /* $NetBSD: clnt_simple.c,v 1.23 2003/01/18 11:29:04 thorpej Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 /* 32 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 33 */ 34 35 /* #ident "@(#)clnt_simple.c 1.17 94/04/24 SMI" */ 36 37 #if 0 38 #if !defined(lint) && defined(SCCSIDS) 39 static char sccsid[] = "@(#)clnt_simple.c 1.49 89/01/31 Copyr 1984 Sun Micro"; 40 #endif 41 #endif 42 43 /* 44 * clnt_simple.c 45 * Simplified front end to client rpc. 46 * 47 */ 48 49 #include "namespace.h" 50 #include "reentrant.h" 51 #include <sys/param.h> 52 #include <stdio.h> 53 #include <assert.h> 54 #include <errno.h> 55 #include <rpc/rpc.h> 56 #include <string.h> 57 #include <stdlib.h> 58 #include <fcntl.h> 59 #include <unistd.h> 60 61 #ifdef __weak_alias 62 __weak_alias(rpc_call,_rpc_call) 63 #endif 64 65 #ifndef MAXHOSTNAMELEN 66 #define MAXHOSTNAMELEN 64 67 #endif 68 69 #ifndef NETIDLEN 70 #define NETIDLEN 32 71 #endif 72 73 struct rpc_call_private { 74 int valid; /* Is this entry valid ? */ 75 CLIENT *client; /* Client handle */ 76 pid_t pid; /* process-id at moment of creation */ 77 rpcprog_t prognum; /* Program */ 78 rpcvers_t versnum; /* Version */ 79 char host[MAXHOSTNAMELEN]; /* Servers host */ 80 char nettype[NETIDLEN]; /* Network type */ 81 }; 82 static struct rpc_call_private *rpc_call_private_main; 83 84 #ifdef _REENTRANT 85 static void rpc_call_destroy __P((void *)); 86 87 static void 88 rpc_call_destroy(void *vp) 89 { 90 struct rpc_call_private *rcp = (struct rpc_call_private *)vp; 91 92 if (rcp) { 93 if (rcp->client) 94 CLNT_DESTROY(rcp->client); 95 free(rcp); 96 } 97 } 98 static thread_key_t rpc_call_key; 99 static once_t rpc_call_once = ONCE_INITIALIZER; 100 101 static void 102 rpc_call_setup(void) 103 { 104 105 thr_keycreate(&rpc_call_key, rpc_call_destroy); 106 } 107 #endif 108 109 110 /* 111 * This is the simplified interface to the client rpc layer. 112 * The client handle is not destroyed here and is reused for 113 * the future calls to same prog, vers, host and nettype combination. 114 * 115 * The total time available is 25 seconds. 116 */ 117 enum clnt_stat 118 rpc_call(host, prognum, versnum, procnum, inproc, in, outproc, out, nettype) 119 const char *host; /* host name */ 120 rpcprog_t prognum; /* program number */ 121 rpcvers_t versnum; /* version number */ 122 rpcproc_t procnum; /* procedure number */ 123 xdrproc_t inproc, outproc; /* in/out XDR procedures */ 124 const char *in; 125 char *out; /* recv/send data */ 126 const char *nettype; /* nettype */ 127 { 128 struct rpc_call_private *rcp = (struct rpc_call_private *) 0; 129 enum clnt_stat clnt_stat; 130 struct timeval timeout, tottimeout; 131 extern int __isthreaded; 132 133 _DIAGASSERT(host != NULL); 134 /* XXX: in may be NULL ??? */ 135 /* XXX: out may be NULL ??? */ 136 /* XXX: nettype may be NULL ??? */ 137 138 #ifdef _REENTRANT 139 if (__isthreaded == 0) { 140 rcp = rpc_call_private_main; 141 } else { 142 thr_once(&rpc_call_once, rpc_call_setup); 143 rcp = thr_getspecific(rpc_call_key); 144 } 145 #else 146 rcp = rpc_call_private_main; 147 #endif 148 if (rcp == NULL) { 149 rcp = malloc(sizeof (*rcp)); 150 if (rcp == NULL) { 151 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 152 rpc_createerr.cf_error.re_errno = errno; 153 return (rpc_createerr.cf_stat); 154 } 155 if (__isthreaded == 0) 156 rpc_call_private_main = rcp; 157 else 158 thr_setspecific(rpc_call_key, (void *) rcp); 159 rcp->valid = 0; 160 rcp->client = NULL; 161 } 162 if ((nettype == NULL) || (nettype[0] == NULL)) 163 nettype = "netpath"; 164 if (!(rcp->valid && rcp->pid == getpid() && 165 (rcp->prognum == prognum) && 166 (rcp->versnum == versnum) && 167 (!strcmp(rcp->host, host)) && 168 (!strcmp(rcp->nettype, nettype)))) { 169 int fd; 170 171 rcp->valid = 0; 172 if (rcp->client) 173 CLNT_DESTROY(rcp->client); 174 /* 175 * Using the first successful transport for that type 176 */ 177 rcp->client = clnt_create(host, prognum, versnum, nettype); 178 rcp->pid = getpid(); 179 if (rcp->client == NULL) { 180 return (rpc_createerr.cf_stat); 181 } 182 /* 183 * Set time outs for connectionless case. Do it 184 * unconditionally. Faster than doing a t_getinfo() 185 * and then doing the right thing. 186 */ 187 timeout.tv_usec = 0; 188 timeout.tv_sec = 5; 189 (void) CLNT_CONTROL(rcp->client, 190 CLSET_RETRY_TIMEOUT, (char *)(void *)&timeout); 191 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd)) 192 fcntl(fd, F_SETFD, 1); /* make it "close on exec" */ 193 rcp->prognum = prognum; 194 rcp->versnum = versnum; 195 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) && 196 (strlen(nettype) < (size_t)NETIDLEN)) { 197 (void) strcpy(rcp->host, host); 198 (void) strcpy(rcp->nettype, nettype); 199 rcp->valid = 1; 200 } else { 201 rcp->valid = 0; 202 } 203 } /* else reuse old client */ 204 tottimeout.tv_sec = 25; 205 tottimeout.tv_usec = 0; 206 /*LINTED const castaway*/ 207 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *) in, 208 outproc, out, tottimeout); 209 /* 210 * if call failed, empty cache 211 */ 212 if (clnt_stat != RPC_SUCCESS) 213 rcp->valid = 0; 214 return (clnt_stat); 215 } 216