1 /* $NetBSD: clnt_simple.c,v 1.12 1998/02/13 05:52:18 lukem 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 1.12 1998/02/13 05:52:18 lukem 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 51 #include <sys/types.h> 52 #include <sys/socket.h> 53 54 #include <netdb.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 60 #include <rpc/rpc.h> 61 62 #ifdef __weak_alias 63 __weak_alias(callrpc,_callrpc); 64 #endif 65 66 static struct callrpc_private { 67 CLIENT *client; 68 int socket; 69 int oldprognum, oldversnum, valid; 70 char *oldhost; 71 } *callrpc_private; 72 73 int 74 callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 75 char *host; 76 int versnum, procnum; 77 xdrproc_t inproc, outproc; 78 char *in, *out; 79 { 80 struct callrpc_private *crp = callrpc_private; 81 struct sockaddr_in server_addr; 82 enum clnt_stat clnt_stat; 83 struct hostent *hp; 84 struct timeval timeout, tottimeout; 85 86 if (crp == 0) { 87 crp = (struct callrpc_private *)calloc(1, sizeof (*crp)); 88 if (crp == 0) 89 return (0); 90 callrpc_private = crp; 91 } 92 if (crp->oldhost == NULL) { 93 crp->oldhost = malloc(256); 94 crp->oldhost[0] = 0; 95 crp->socket = RPC_ANYSOCK; 96 } 97 if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum 98 && strcmp(crp->oldhost, host) == 0) { 99 /* reuse old client */ 100 } else { 101 crp->valid = 0; 102 (void)close(crp->socket); 103 crp->socket = RPC_ANYSOCK; 104 if (crp->client) { 105 clnt_destroy(crp->client); 106 crp->client = NULL; 107 } 108 if ((hp = gethostbyname(host)) == NULL) 109 return ((int) RPC_UNKNOWNHOST); 110 timeout.tv_usec = 0; 111 timeout.tv_sec = 5; 112 memset(&server_addr, 0, sizeof(server_addr)); 113 memmove((char *)&server_addr.sin_addr, hp->h_addr, 114 hp->h_length); 115 server_addr.sin_len = sizeof(struct sockaddr_in); 116 server_addr.sin_family = AF_INET; 117 server_addr.sin_port = 0; 118 if ((crp->client = clntudp_create(&server_addr, (u_long)prognum, 119 (u_long)versnum, timeout, &crp->socket)) == NULL) 120 return ((int) rpc_createerr.cf_stat); 121 crp->valid = 1; 122 crp->oldprognum = prognum; 123 crp->oldversnum = versnum; 124 (void)strncpy(crp->oldhost, host, 256 - 1); 125 } 126 tottimeout.tv_sec = 25; 127 tottimeout.tv_usec = 0; 128 clnt_stat = clnt_call(crp->client, procnum, inproc, in, 129 outproc, out, tottimeout); 130 /* 131 * if call failed, empty cache 132 */ 133 if (clnt_stat != RPC_SUCCESS) 134 crp->valid = 0; 135 return ((int) clnt_stat); 136 } 137