1 /* $NetBSD: clnt_simple.c,v 1.9 1997/07/21 14:08:24 jtc 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 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char *sccsid = "@(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro"; 36 static char *sccsid = "@(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC"; 37 #else 38 __RCSID("$NetBSD: clnt_simple.c,v 1.9 1997/07/21 14:08:24 jtc Exp $"); 39 #endif 40 #endif 41 42 /* 43 * clnt_simple.c 44 * Simplified front end to rpc. 45 * 46 * Copyright (C) 1984, Sun Microsystems, Inc. 47 */ 48 49 #include "namespace.h" 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 #include <rpc/rpc.h> 55 #include <sys/socket.h> 56 #include <netdb.h> 57 58 #ifdef __weak_alias 59 __weak_alias(callrpc,_callrpc); 60 #endif 61 62 static struct callrpc_private { 63 CLIENT *client; 64 int socket; 65 int oldprognum, oldversnum, valid; 66 char *oldhost; 67 } *callrpc_private; 68 69 int 70 callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 71 char *host; 72 int versnum, procnum; 73 xdrproc_t inproc, outproc; 74 char *in, *out; 75 { 76 register struct callrpc_private *crp = callrpc_private; 77 struct sockaddr_in server_addr; 78 enum clnt_stat clnt_stat; 79 struct hostent *hp; 80 struct timeval timeout, tottimeout; 81 82 if (crp == 0) { 83 crp = (struct callrpc_private *)calloc(1, sizeof (*crp)); 84 if (crp == 0) 85 return (0); 86 callrpc_private = crp; 87 } 88 if (crp->oldhost == NULL) { 89 crp->oldhost = malloc(256); 90 crp->oldhost[0] = 0; 91 crp->socket = RPC_ANYSOCK; 92 } 93 if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum 94 && strcmp(crp->oldhost, host) == 0) { 95 /* reuse old client */ 96 } else { 97 crp->valid = 0; 98 (void)close(crp->socket); 99 crp->socket = RPC_ANYSOCK; 100 if (crp->client) { 101 clnt_destroy(crp->client); 102 crp->client = NULL; 103 } 104 if ((hp = gethostbyname(host)) == NULL) 105 return ((int) RPC_UNKNOWNHOST); 106 timeout.tv_usec = 0; 107 timeout.tv_sec = 5; 108 memset(&server_addr, 0, sizeof(server_addr)); 109 bcopy(hp->h_addr, (char *)&server_addr.sin_addr, hp->h_length); 110 server_addr.sin_len = sizeof(struct sockaddr_in); 111 server_addr.sin_family = AF_INET; 112 server_addr.sin_port = 0; 113 if ((crp->client = clntudp_create(&server_addr, (u_long)prognum, 114 (u_long)versnum, timeout, &crp->socket)) == NULL) 115 return ((int) rpc_createerr.cf_stat); 116 crp->valid = 1; 117 crp->oldprognum = prognum; 118 crp->oldversnum = versnum; 119 (void)strncpy(crp->oldhost, host, 256 - 1); 120 } 121 tottimeout.tv_sec = 25; 122 tottimeout.tv_usec = 0; 123 clnt_stat = clnt_call(crp->client, procnum, inproc, in, 124 outproc, out, tottimeout); 125 /* 126 * if call failed, empty cache 127 */ 128 if (clnt_stat != RPC_SUCCESS) 129 crp->valid = 0; 130 return ((int) clnt_stat); 131 } 132