1 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 31 #if defined(LIBC_SCCS) && !defined(lint) 32 static char *rcsid = "$OpenBSD: clnt_simple.c,v 1.10 2001/06/27 00:58:56 lebel Exp $"; 33 #endif /* LIBC_SCCS and not lint */ 34 35 /* 36 * clnt_simple.c 37 * Simplified front end to rpc. 38 * 39 * Copyright (C) 1984, Sun Microsystems, Inc. 40 */ 41 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <rpc/rpc.h> 46 #include <sys/socket.h> 47 #include <netdb.h> 48 #include <unistd.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 int 58 callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out) 59 char *host; 60 int prognum, versnum, procnum; 61 xdrproc_t inproc, outproc; 62 char *in, *out; 63 { 64 struct callrpc_private *save_callrpc_private = callrpc_private; 65 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 == NULL) { 72 crp = (struct callrpc_private *)calloc(1, sizeof (*crp)); 73 if (crp == NULL) 74 return (0); 75 callrpc_private = crp; 76 } 77 if (crp->oldhost == NULL) { 78 crp->oldhost = malloc(MAXHOSTNAMELEN); 79 if (crp->oldhost == NULL) { 80 free(crp); 81 callrpc_private = save_callrpc_private; 82 return (0); 83 } 84 crp->oldhost[0] = 0; 85 crp->socket = RPC_ANYSOCK; 86 } 87 if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum 88 && strcmp(crp->oldhost, host) == 0) { 89 /* reuse old client */ 90 } else { 91 crp->valid = 0; 92 if (crp->socket != -1) 93 (void)close(crp->socket); 94 crp->socket = RPC_ANYSOCK; 95 if (crp->client) { 96 clnt_destroy(crp->client); 97 crp->client = NULL; 98 } 99 if ((hp = gethostbyname(host)) == NULL) 100 return ((int) RPC_UNKNOWNHOST); 101 timeout.tv_usec = 0; 102 timeout.tv_sec = 5; 103 memset(&server_addr, 0, sizeof(server_addr)); 104 memcpy((char *)&server_addr.sin_addr, hp->h_addr, hp->h_length); 105 server_addr.sin_len = sizeof(struct sockaddr_in); 106 server_addr.sin_family = AF_INET; 107 server_addr.sin_port = 0; 108 if ((crp->client = clntudp_create(&server_addr, (u_long)prognum, 109 (u_long)versnum, timeout, &crp->socket)) == NULL) 110 return ((int) rpc_createerr.cf_stat); 111 crp->valid = 1; 112 crp->oldprognum = prognum; 113 crp->oldversnum = versnum; 114 strlcpy(crp->oldhost, host, MAXHOSTNAMELEN); 115 } 116 tottimeout.tv_sec = 25; 117 tottimeout.tv_usec = 0; 118 clnt_stat = clnt_call(crp->client, procnum, inproc, in, 119 outproc, out, tottimeout); 120 /* 121 * if call failed, empty cache 122 */ 123 if (clnt_stat != RPC_SUCCESS) 124 crp->valid = 0; 125 return ((int) clnt_stat); 126 } 127