1 /* $NetBSD: clnt_simple.c,v 1.19 2000/01/22 22:19:17 mycroft 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 1.19 2000/01/22 22:19:17 mycroft 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 <assert.h> 55 #include <netdb.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <unistd.h> 60 61 #include <rpc/rpc.h> 62 63 #ifdef __weak_alias 64 __weak_alias(callrpc,_callrpc) 65 #endif 66 67 static struct callrpc_private { 68 CLIENT *client; 69 int socket; 70 int oldprognum, oldversnum, valid; 71 char *oldhost; 72 } *callrpc_private; 73 74 int 75 callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 76 char *host; 77 int prognum, versnum, procnum; 78 xdrproc_t inproc, outproc; 79 char *in, *out; 80 { 81 struct callrpc_private *crp = callrpc_private; 82 struct sockaddr_in server_addr; 83 enum clnt_stat clnt_stat; 84 struct hostent *hp; 85 struct timeval timeout, tottimeout; 86 87 _DIAGASSERT(host != NULL); 88 /* in may be NULL */ 89 /* out may be NULL */ 90 91 if (crp == 0) { 92 crp = (struct callrpc_private *)calloc(1, sizeof (*crp)); 93 if (crp == 0) 94 return (0); 95 callrpc_private = crp; 96 } 97 if (crp->oldhost == NULL) { 98 crp->oldhost = malloc(256); 99 crp->oldhost[0] = 0; 100 crp->socket = RPC_ANYSOCK; 101 } 102 if (crp->valid && crp->oldprognum == prognum 103 && crp->oldversnum == versnum && strcmp(crp->oldhost, host) == 0) { 104 /* reuse old client */ 105 } else { 106 crp->valid = 0; 107 if (crp->socket != -1) { 108 (void)close(crp->socket); 109 crp->socket = -1; 110 } 111 if (crp->client) { 112 CLNT_DESTROY(crp->client); 113 crp->client = NULL; 114 } 115 crp->socket = RPC_ANYSOCK; 116 if ((hp = gethostbyname(host)) == NULL) 117 return ((int) RPC_UNKNOWNHOST); 118 timeout.tv_usec = 0; 119 timeout.tv_sec = 5; 120 memset(&server_addr, 0, sizeof(server_addr)); 121 if (hp->h_length > sizeof(struct sockaddr_in)) 122 hp->h_length = sizeof(struct sockaddr_in); 123 memcpy(&server_addr.sin_addr.s_addr, hp->h_addr, 124 (size_t)hp->h_length); 125 server_addr.sin_len = sizeof(struct sockaddr_in); 126 server_addr.sin_family = AF_INET; 127 server_addr.sin_port = 0; 128 if ((crp->client = clntudp_create(&server_addr, (u_long)prognum, 129 (u_long)versnum, timeout, &crp->socket)) == NULL) 130 return ((int) rpc_createerr.cf_stat); 131 crp->valid = 1; 132 crp->oldprognum = prognum; 133 crp->oldversnum = versnum; 134 (void)strncpy(crp->oldhost, host, 256 - 1); 135 } 136 tottimeout.tv_sec = 25; 137 tottimeout.tv_usec = 0; 138 clnt_stat = clnt_call(crp->client, (unsigned long)procnum, inproc, in, 139 outproc, out, tottimeout); 140 /* 141 * if call failed, empty cache 142 */ 143 if (clnt_stat != RPC_SUCCESS) 144 crp->valid = 0; 145 return ((int) clnt_stat); 146 } 147