1 /* $NetBSD: clnt_simple.c,v 1.6 1996/03/29 23:00:51 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 #if defined(LIBC_SCCS) && !defined(lint) 33 /*static char *sccsid = "from: @(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro";*/ 34 /*static char *sccsid = "from: @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC";*/ 35 static char *rcsid = "$NetBSD: clnt_simple.c,v 1.6 1996/03/29 23:00:51 jtc Exp $"; 36 #endif 37 38 /* 39 * clnt_simple.c 40 * Simplified front end to rpc. 41 * 42 * Copyright (C) 1984, Sun Microsystems, Inc. 43 */ 44 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include <rpc/rpc.h> 49 #include <sys/socket.h> 50 #include <netdb.h> 51 52 static struct callrpc_private { 53 CLIENT *client; 54 int socket; 55 int oldprognum, oldversnum, valid; 56 char *oldhost; 57 } *callrpc_private; 58 59 int 60 callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 61 char *host; 62 xdrproc_t inproc, outproc; 63 char *in, *out; 64 { 65 register struct callrpc_private *crp = callrpc_private; 66 struct sockaddr_in server_addr; 67 enum clnt_stat clnt_stat; 68 struct hostent *hp; 69 struct timeval timeout, tottimeout; 70 71 if (crp == 0) { 72 crp = (struct callrpc_private *)calloc(1, sizeof (*crp)); 73 if (crp == 0) 74 return (0); 75 callrpc_private = crp; 76 } 77 if (crp->oldhost == NULL) { 78 crp->oldhost = malloc(256); 79 crp->oldhost[0] = 0; 80 crp->socket = RPC_ANYSOCK; 81 } 82 if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum 83 && strcmp(crp->oldhost, host) == 0) { 84 /* reuse old client */ 85 } else { 86 crp->valid = 0; 87 (void)close(crp->socket); 88 crp->socket = RPC_ANYSOCK; 89 if (crp->client) { 90 clnt_destroy(crp->client); 91 crp->client = NULL; 92 } 93 if ((hp = gethostbyname(host)) == NULL) 94 return ((int) RPC_UNKNOWNHOST); 95 timeout.tv_usec = 0; 96 timeout.tv_sec = 5; 97 memset(&server_addr, 0, sizeof(server_addr)); 98 bcopy(hp->h_addr, (char *)&server_addr.sin_addr, hp->h_length); 99 server_addr.sin_len = sizeof(struct sockaddr_in); 100 server_addr.sin_family = AF_INET; 101 server_addr.sin_port = 0; 102 if ((crp->client = clntudp_create(&server_addr, (u_long)prognum, 103 (u_long)versnum, timeout, &crp->socket)) == NULL) 104 return ((int) rpc_createerr.cf_stat); 105 crp->valid = 1; 106 crp->oldprognum = prognum; 107 crp->oldversnum = versnum; 108 (void) strcpy(crp->oldhost, host); 109 } 110 tottimeout.tv_sec = 25; 111 tottimeout.tv_usec = 0; 112 clnt_stat = clnt_call(crp->client, procnum, inproc, in, 113 outproc, out, tottimeout); 114 /* 115 * if call failed, empty cache 116 */ 117 if (clnt_stat != RPC_SUCCESS) 118 crp->valid = 0; 119 return ((int) clnt_stat); 120 } 121