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 1.2 1995/05/30 05:41:17 rgrimes 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 <unistd.h> 46 #include <string.h> 47 #include <rpc/rpc.h> 48 #include <sys/socket.h> 49 #include <netdb.h> 50 51 static struct callrpc_private { 52 CLIENT *client; 53 int socket; 54 int oldprognum, oldversnum, valid; 55 char *oldhost; 56 } *callrpc_private; 57 58 callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 59 char *host; 60 xdrproc_t inproc, outproc; 61 char *in, *out; 62 { 63 register struct callrpc_private *crp = callrpc_private; 64 struct sockaddr_in server_addr; 65 enum clnt_stat clnt_stat; 66 struct hostent *hp; 67 struct timeval timeout, tottimeout; 68 69 if (crp == 0) { 70 crp = (struct callrpc_private *)calloc(1, sizeof (*crp)); 71 if (crp == 0) 72 return (0); 73 callrpc_private = crp; 74 } 75 if (crp->oldhost == NULL) { 76 crp->oldhost = malloc(256); 77 crp->oldhost[0] = 0; 78 crp->socket = RPC_ANYSOCK; 79 } 80 if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum 81 && strcmp(crp->oldhost, host) == 0) { 82 /* reuse old client */ 83 } else { 84 crp->valid = 0; 85 (void)close(crp->socket); 86 crp->socket = RPC_ANYSOCK; 87 if (crp->client) { 88 clnt_destroy(crp->client); 89 crp->client = NULL; 90 } 91 if ((hp = gethostbyname(host)) == NULL) 92 return ((int) RPC_UNKNOWNHOST); 93 timeout.tv_usec = 0; 94 timeout.tv_sec = 5; 95 bcopy(hp->h_addr, (char *)&server_addr.sin_addr, hp->h_length); 96 server_addr.sin_family = AF_INET; 97 server_addr.sin_port = 0; 98 if ((crp->client = clntudp_create(&server_addr, (u_long)prognum, 99 (u_long)versnum, timeout, &crp->socket)) == NULL) 100 return ((int) rpc_createerr.cf_stat); 101 crp->valid = 1; 102 crp->oldprognum = prognum; 103 crp->oldversnum = versnum; 104 (void) strcpy(crp->oldhost, host); 105 } 106 tottimeout.tv_sec = 25; 107 tottimeout.tv_usec = 0; 108 clnt_stat = clnt_call(crp->client, procnum, inproc, in, 109 outproc, out, tottimeout); 110 /* 111 * if call failed, empty cache 112 */ 113 if (clnt_stat != RPC_SUCCESS) 114 crp->valid = 0; 115 return ((int) clnt_stat); 116 } 117