1 /* $OpenBSD: clnt_simple.c,v 1.13 2006/01/17 15:43:34 millert Exp $ */ 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 /* 32 * clnt_simple.c 33 * Simplified front end to rpc. 34 * 35 * Copyright (C) 1984, Sun Microsystems, Inc. 36 */ 37 38 #include <sys/param.h> 39 #include <sys/socket.h> 40 #include <netdb.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <unistd.h> 45 #include <rpc/rpc.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 int 55 callrpc(char *host, int prognum, int versnum, int procnum, xdrproc_t inproc, 56 char *in, xdrproc_t outproc, char *out) 57 { 58 struct callrpc_private *save_callrpc_private = callrpc_private; 59 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 == NULL) { 66 crp = (struct callrpc_private *)calloc(1, sizeof (*crp)); 67 if (crp == NULL) 68 return (0); 69 callrpc_private = crp; 70 } 71 if (crp->oldhost == NULL) { 72 crp->oldhost = malloc(MAXHOSTNAMELEN); 73 if (crp->oldhost == NULL) { 74 free(crp); 75 callrpc_private = save_callrpc_private; 76 return (0); 77 } 78 crp->oldhost[0] = 0; 79 crp->socket = RPC_ANYSOCK; 80 } 81 if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum 82 && strcmp(crp->oldhost, host) == 0) { 83 /* reuse old client */ 84 } else { 85 crp->valid = 0; 86 if (crp->socket != -1) 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 memcpy((char *)&server_addr.sin_addr, hp->h_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 strlcpy(crp->oldhost, host, MAXHOSTNAMELEN); 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