1 /* $NetBSD: clnt_simple.c,v 1.21 2000/07/06 03:10:34 christos 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 #if defined(LIBC_SCCS) && !defined(lint) 36 static char *sccsid2 = "from: @(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro"; 37 static char *sccsid = "from: @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC"; 38 #endif 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 /* 43 * clnt_simple.c 44 * Simplified front end to client rpc. 45 * 46 */ 47 48 #include "namespace.h" 49 #include "reentrant.h" 50 #include <sys/param.h> 51 #include <stdio.h> 52 #include <errno.h> 53 #include <rpc/rpc.h> 54 #include <string.h> 55 #include <stdlib.h> 56 #include <fcntl.h> 57 #include <unistd.h> 58 #include "un-namespace.h" 59 #include "mt_misc.h" 60 61 #ifndef MAXHOSTNAMELEN 62 #define MAXHOSTNAMELEN 64 63 #endif 64 65 #ifndef NETIDLEN 66 #define NETIDLEN 32 67 #endif 68 69 struct rpc_call_private { 70 int valid; /* Is this entry valid ? */ 71 CLIENT *client; /* Client handle */ 72 pid_t pid; /* process-id at moment of creation */ 73 rpcprog_t prognum; /* Program */ 74 rpcvers_t versnum; /* Version */ 75 char host[MAXHOSTNAMELEN]; /* Servers host */ 76 char nettype[NETIDLEN]; /* Network type */ 77 }; 78 static struct rpc_call_private *rpc_call_private_main; 79 80 static void rpc_call_destroy(void *); 81 82 static void 83 rpc_call_destroy(void *vp) 84 { 85 struct rpc_call_private *rcp = (struct rpc_call_private *)vp; 86 87 if (rcp) { 88 if (rcp->client) 89 CLNT_DESTROY(rcp->client); 90 free(rcp); 91 } 92 } 93 94 /* 95 * This is the simplified interface to the client rpc layer. 96 * The client handle is not destroyed here and is reused for 97 * the future calls to same prog, vers, host and nettype combination. 98 * 99 * The total time available is 25 seconds. 100 */ 101 enum clnt_stat 102 rpc_call(host, prognum, versnum, procnum, inproc, in, outproc, out, nettype) 103 const char *host; /* host name */ 104 rpcprog_t prognum; /* program number */ 105 rpcvers_t versnum; /* version number */ 106 rpcproc_t procnum; /* procedure number */ 107 xdrproc_t inproc, outproc; /* in/out XDR procedures */ 108 const char *in; 109 char *out; /* recv/send data */ 110 const char *nettype; /* nettype */ 111 { 112 struct rpc_call_private *rcp = (struct rpc_call_private *) 0; 113 enum clnt_stat clnt_stat; 114 struct timeval timeout, tottimeout; 115 static thread_key_t rpc_call_key; 116 int main_thread = 1; 117 118 if ((main_thread = thr_main())) { 119 rcp = rpc_call_private_main; 120 } else { 121 if (rpc_call_key == 0) { 122 mutex_lock(&tsd_lock); 123 if (rpc_call_key == 0) 124 thr_keycreate(&rpc_call_key, rpc_call_destroy); 125 mutex_unlock(&tsd_lock); 126 } 127 rcp = (struct rpc_call_private *)thr_getspecific(rpc_call_key); 128 } 129 if (rcp == NULL) { 130 rcp = malloc(sizeof (*rcp)); 131 if (rcp == NULL) { 132 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 133 rpc_createerr.cf_error.re_errno = errno; 134 return (rpc_createerr.cf_stat); 135 } 136 if (main_thread) 137 rpc_call_private_main = rcp; 138 else 139 thr_setspecific(rpc_call_key, (void *) rcp); 140 rcp->valid = 0; 141 rcp->client = NULL; 142 } 143 if ((nettype == NULL) || (nettype[0] == 0)) 144 nettype = "netpath"; 145 if (!(rcp->valid && rcp->pid == getpid() && 146 (rcp->prognum == prognum) && 147 (rcp->versnum == versnum) && 148 (!strcmp(rcp->host, host)) && 149 (!strcmp(rcp->nettype, nettype)))) { 150 int fd; 151 152 rcp->valid = 0; 153 if (rcp->client) 154 CLNT_DESTROY(rcp->client); 155 /* 156 * Using the first successful transport for that type 157 */ 158 rcp->client = clnt_create(host, prognum, versnum, nettype); 159 rcp->pid = getpid(); 160 if (rcp->client == NULL) { 161 return (rpc_createerr.cf_stat); 162 } 163 /* 164 * Set time outs for connectionless case. Do it 165 * unconditionally. Faster than doing a t_getinfo() 166 * and then doing the right thing. 167 */ 168 timeout.tv_usec = 0; 169 timeout.tv_sec = 5; 170 (void) CLNT_CONTROL(rcp->client, 171 CLSET_RETRY_TIMEOUT, (char *)(void *)&timeout); 172 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd)) 173 _fcntl(fd, F_SETFD, 1); /* make it "close on exec" */ 174 rcp->prognum = prognum; 175 rcp->versnum = versnum; 176 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) && 177 (strlen(nettype) < (size_t)NETIDLEN)) { 178 (void) strcpy(rcp->host, host); 179 (void) strcpy(rcp->nettype, nettype); 180 rcp->valid = 1; 181 } else { 182 rcp->valid = 0; 183 } 184 } /* else reuse old client */ 185 tottimeout.tv_sec = 25; 186 tottimeout.tv_usec = 0; 187 /*LINTED const castaway*/ 188 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *) in, 189 outproc, out, tottimeout); 190 /* 191 * if call failed, empty cache 192 */ 193 if (clnt_stat != RPC_SUCCESS) 194 rcp->valid = 0; 195 return (clnt_stat); 196 } 197