1 /* @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC */ 2 /* 3 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 4 * unrestricted use provided that this legend is included on all tape 5 * media and as a part of the software program in whole or part. Users 6 * may copy or modify Sun RPC without charge, but are not authorized 7 * to license or distribute it to anyone else except as part of a product or 8 * program developed by the user. 9 * 10 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 11 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 12 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 13 * 14 * Sun RPC is provided with no support and without any obligation on the 15 * part of Sun Microsystems, Inc. to assist in its use, correction, 16 * modification or enhancement. 17 * 18 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 19 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 20 * OR ANY PART THEREOF. 21 * 22 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 23 * or profits or other special, indirect and consequential damages, even if 24 * Sun has been advised of the possibility of such damages. 25 * 26 * Sun Microsystems, Inc. 27 * 2550 Garcia Avenue 28 * Mountain View, California 94043 29 */ 30 #if !defined(lint) && defined(SCCSIDS) 31 static char sccsid[] = "@(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro"; 32 #endif 33 34 /* 35 * clnt_simple.c 36 * Simplified front end to rpc. 37 * 38 * Copyright (C) 1984, Sun Microsystems, Inc. 39 */ 40 41 #include <stdio.h> 42 #include <rpc/rpc.h> 43 #include <sys/socket.h> 44 #include <netdb.h> 45 #include <strings.h> 46 47 static struct callrpc_private { 48 CLIENT *client; 49 int socket; 50 int oldprognum, oldversnum, valid; 51 char *oldhost; 52 } *callrpc_private; 53 54 callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 55 char *host; 56 xdrproc_t inproc, outproc; 57 char *in, *out; 58 { 59 register struct callrpc_private *crp = callrpc_private; 60 struct sockaddr_in server_addr; 61 enum clnt_stat clnt_stat; 62 struct hostent *hp; 63 struct timeval timeout, tottimeout; 64 65 if (crp == 0) { 66 crp = (struct callrpc_private *)calloc(1, sizeof (*crp)); 67 if (crp == 0) 68 return (0); 69 callrpc_private = crp; 70 } 71 if (crp->oldhost == NULL) { 72 crp->oldhost = malloc(256); 73 crp->oldhost[0] = 0; 74 crp->socket = RPC_ANYSOCK; 75 } 76 if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum 77 && strcmp(crp->oldhost, host) == 0) { 78 /* reuse old client */ 79 } else { 80 crp->valid = 0; 81 (void)close(crp->socket); 82 crp->socket = RPC_ANYSOCK; 83 if (crp->client) { 84 clnt_destroy(crp->client); 85 crp->client = NULL; 86 } 87 if ((hp = gethostbyname(host)) == NULL) 88 return ((int) RPC_UNKNOWNHOST); 89 timeout.tv_usec = 0; 90 timeout.tv_sec = 5; 91 bcopy(hp->h_addr, (char *)&server_addr.sin_addr, hp->h_length); 92 server_addr.sin_family = AF_INET; 93 server_addr.sin_port = 0; 94 if ((crp->client = clntudp_create(&server_addr, (u_long)prognum, 95 (u_long)versnum, timeout, &crp->socket)) == NULL) 96 return ((int) rpc_createerr.cf_stat); 97 crp->valid = 1; 98 crp->oldprognum = prognum; 99 crp->oldversnum = versnum; 100 (void) strcpy(crp->oldhost, host); 101 } 102 tottimeout.tv_sec = 25; 103 tottimeout.tv_usec = 0; 104 clnt_stat = clnt_call(crp->client, procnum, inproc, in, 105 outproc, out, tottimeout); 106 /* 107 * if call failed, empty cache 108 */ 109 if (clnt_stat != RPC_SUCCESS) 110 crp->valid = 0; 111 return ((int) clnt_stat); 112 } 113