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 30 #if defined(LIBC_SCCS) && !defined(lint) 31 /*static char *sccsid = "from: @(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro";*/ 32 /*static char *sccsid = "from: @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC";*/ 33 static char *rcsid = "$Id: clnt_simple.c,v 1.1 1993/10/27 05:40:23 paul Exp $"; 34 #endif 35 36 /* 37 * clnt_simple.c 38 * Simplified front end to rpc. 39 * 40 * Copyright (C) 1984, Sun Microsystems, Inc. 41 */ 42 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <rpc/rpc.h> 47 #include <sys/socket.h> 48 #include <netdb.h> 49 50 static struct callrpc_private { 51 CLIENT *client; 52 int socket; 53 int oldprognum, oldversnum, valid; 54 char *oldhost; 55 } *callrpc_private; 56 57 callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 58 char *host; 59 xdrproc_t inproc, outproc; 60 char *in, *out; 61 { 62 register struct callrpc_private *crp = callrpc_private; 63 struct sockaddr_in server_addr; 64 enum clnt_stat clnt_stat; 65 struct hostent *hp; 66 struct timeval timeout, tottimeout; 67 68 if (crp == 0) { 69 crp = (struct callrpc_private *)calloc(1, sizeof (*crp)); 70 if (crp == 0) 71 return (0); 72 callrpc_private = crp; 73 } 74 if (crp->oldhost == NULL) { 75 crp->oldhost = malloc(256); 76 crp->oldhost[0] = 0; 77 crp->socket = RPC_ANYSOCK; 78 } 79 if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum 80 && strcmp(crp->oldhost, host) == 0) { 81 /* reuse old client */ 82 } else { 83 crp->valid = 0; 84 (void)close(crp->socket); 85 crp->socket = RPC_ANYSOCK; 86 if (crp->client) { 87 clnt_destroy(crp->client); 88 crp->client = NULL; 89 } 90 if ((hp = gethostbyname(host)) == NULL) 91 return ((int) RPC_UNKNOWNHOST); 92 timeout.tv_usec = 0; 93 timeout.tv_sec = 5; 94 bcopy(hp->h_addr, (char *)&server_addr.sin_addr, hp->h_length); 95 server_addr.sin_family = AF_INET; 96 server_addr.sin_port = 0; 97 if ((crp->client = clntudp_create(&server_addr, (u_long)prognum, 98 (u_long)versnum, timeout, &crp->socket)) == NULL) 99 return ((int) rpc_createerr.cf_stat); 100 crp->valid = 1; 101 crp->oldprognum = prognum; 102 crp->oldversnum = versnum; 103 (void) strcpy(crp->oldhost, host); 104 } 105 tottimeout.tv_sec = 25; 106 tottimeout.tv_usec = 0; 107 clnt_stat = clnt_call(crp->client, procnum, inproc, in, 108 outproc, out, tottimeout); 109 /* 110 * if call failed, empty cache 111 */ 112 if (clnt_stat != RPC_SUCCESS) 113 crp->valid = 0; 114 return ((int) clnt_stat); 115 } 116