1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 * 29 * @(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro 30 * @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC 31 * $NetBSD: clnt_simple.c,v 1.21 2000/07/06 03:10:34 christos Exp $ 32 * $FreeBSD: src/lib/libc/rpc/clnt_simple.c,v 1.20 2006/02/27 22:10:59 deischen Exp $ 33 * $DragonFly: src/lib/libc/rpc/clnt_simple.c,v 1.5 2005/11/13 12:27:04 swildner Exp $ 34 */ 35 /* 36 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 37 */ 38 39 /* 40 * clnt_simple.c 41 * Simplified front end to client rpc. 42 * 43 */ 44 45 #include "namespace.h" 46 #include "reentrant.h" 47 #include <sys/param.h> 48 #include <stdio.h> 49 #include <errno.h> 50 #include <rpc/rpc.h> 51 #include <string.h> 52 #include <stdlib.h> 53 #include <fcntl.h> 54 #include <unistd.h> 55 #include "un-namespace.h" 56 #include "mt_misc.h" 57 58 #ifndef MAXHOSTNAMELEN 59 #define MAXHOSTNAMELEN 64 60 #endif 61 62 #ifndef NETIDLEN 63 #define NETIDLEN 32 64 #endif 65 66 struct rpc_call_private { 67 int valid; /* Is this entry valid ? */ 68 CLIENT *client; /* Client handle */ 69 pid_t pid; /* process-id at moment of creation */ 70 rpcprog_t prognum; /* Program */ 71 rpcvers_t versnum; /* Version */ 72 char host[MAXHOSTNAMELEN]; /* Servers host */ 73 char nettype[NETIDLEN]; /* Network type */ 74 }; 75 static struct rpc_call_private *rpc_call_private_main; 76 77 static void rpc_call_destroy(void *); 78 79 static void 80 rpc_call_destroy(void *vp) 81 { 82 struct rpc_call_private *rcp = (struct rpc_call_private *)vp; 83 84 if (rcp) { 85 if (rcp->client) 86 CLNT_DESTROY(rcp->client); 87 free(rcp); 88 } 89 } 90 91 /* 92 * This is the simplified interface to the client rpc layer. 93 * The client handle is not destroyed here and is reused for 94 * the future calls to same prog, vers, host and nettype combination. 95 * 96 * The total time available is 25 seconds. 97 */ 98 enum clnt_stat 99 rpc_call(const char *host, /* host name */ 100 rpcprog_t prognum, /* program number */ 101 rpcvers_t versnum, /* version number */ 102 rpcproc_t procnum, /* procedure number */ 103 xdrproc_t inproc, 104 const char *in, 105 xdrproc_t outproc, /* in/out XDR procedures */ 106 char *out, /* recv/send data */ 107 const char *nettype) /* nettype */ 108 { 109 struct rpc_call_private *rcp = NULL; 110 enum clnt_stat clnt_stat; 111 struct timeval timeout, tottimeout; 112 static thread_key_t rpc_call_key; 113 int main_thread = 1; 114 115 if ((main_thread = thr_main())) { 116 rcp = rpc_call_private_main; 117 } else { 118 if (rpc_call_key == 0) { 119 mutex_lock(&tsd_lock); 120 if (rpc_call_key == 0) 121 thr_keycreate(&rpc_call_key, rpc_call_destroy); 122 mutex_unlock(&tsd_lock); 123 } 124 rcp = (struct rpc_call_private *)thr_getspecific(rpc_call_key); 125 } 126 if (rcp == NULL) { 127 rcp = malloc(sizeof (*rcp)); 128 if (rcp == NULL) { 129 rpc_createerr.cf_stat = RPC_SYSTEMERROR; 130 rpc_createerr.cf_error.re_errno = errno; 131 return (rpc_createerr.cf_stat); 132 } 133 if (main_thread) 134 rpc_call_private_main = rcp; 135 else 136 thr_setspecific(rpc_call_key, (void *) rcp); 137 rcp->valid = 0; 138 rcp->client = NULL; 139 } 140 if ((nettype == NULL) || (nettype[0] == 0)) 141 nettype = "netpath"; 142 if (!(rcp->valid && rcp->pid == getpid() && 143 (rcp->prognum == prognum) && 144 (rcp->versnum == versnum) && 145 (!strcmp(rcp->host, host)) && 146 (!strcmp(rcp->nettype, nettype)))) { 147 int fd; 148 149 rcp->valid = 0; 150 if (rcp->client) 151 CLNT_DESTROY(rcp->client); 152 /* 153 * Using the first successful transport for that type 154 */ 155 rcp->client = clnt_create(host, prognum, versnum, nettype); 156 rcp->pid = getpid(); 157 if (rcp->client == NULL) { 158 return (rpc_createerr.cf_stat); 159 } 160 /* 161 * Set time outs for connectionless case. Do it 162 * unconditionally. Faster than doing a t_getinfo() 163 * and then doing the right thing. 164 */ 165 timeout.tv_usec = 0; 166 timeout.tv_sec = 5; 167 CLNT_CONTROL(rcp->client, 168 CLSET_RETRY_TIMEOUT, (char *)(void *)&timeout); 169 if (CLNT_CONTROL(rcp->client, CLGET_FD, (char *)(void *)&fd)) 170 _fcntl(fd, F_SETFD, 1); /* make it "close on exec" */ 171 rcp->prognum = prognum; 172 rcp->versnum = versnum; 173 if ((strlen(host) < (size_t)MAXHOSTNAMELEN) && 174 (strlen(nettype) < (size_t)NETIDLEN)) { 175 strcpy(rcp->host, host); 176 strcpy(rcp->nettype, nettype); 177 rcp->valid = 1; 178 } else { 179 rcp->valid = 0; 180 } 181 } /* else reuse old client */ 182 tottimeout.tv_sec = 25; 183 tottimeout.tv_usec = 0; 184 /*LINTED const castaway*/ 185 clnt_stat = CLNT_CALL(rcp->client, procnum, inproc, (char *) in, 186 outproc, out, tottimeout); 187 /* 188 * if call failed, empty cache 189 */ 190 if (clnt_stat != RPC_SUCCESS) 191 rcp->valid = 0; 192 return (clnt_stat); 193 } 194