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 * @(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro 30 * @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC 31 * $FreeBSD: src/lib/libc/rpc/clnt_simple.c,v 1.12 2000/01/27 23:06:35 jasone Exp $ 32 * $DragonFly: src/lib/libc/rpc/clnt_simple.c,v 1.5 2005/11/13 12:27:04 swildner Exp $ 33 */ 34 35 /* 36 * clnt_simple.c 37 * Simplified front end to rpc. 38 * 39 * Copyright (C) 1984, Sun Microsystems, Inc. 40 */ 41 42 #include "namespace.h" 43 #include <sys/param.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 #include <string.h> 48 #include <rpc/rpc.h> 49 #include <sys/socket.h> 50 #include <netdb.h> 51 #include "un-namespace.h" 52 53 static struct callrpc_private { 54 CLIENT *client; 55 int socket; 56 int oldprognum, oldversnum, valid; 57 char *oldhost; 58 } *callrpc_private; 59 60 int 61 callrpc(char *host, int prognum, int versnum, int procnum, xdrproc_t inproc, 62 char *in, xdrproc_t outproc, char *out) 63 { 64 struct callrpc_private *crp = callrpc_private; 65 struct sockaddr_in server_addr; 66 enum clnt_stat clnt_stat; 67 struct hostent *hp; 68 struct timeval timeout, tottimeout; 69 70 if (crp == 0) { 71 crp = (struct callrpc_private *)calloc(1, sizeof (*crp)); 72 if (crp == 0) 73 return (0); 74 callrpc_private = crp; 75 } 76 if (crp->oldhost == NULL) { 77 crp->oldhost = malloc(MAXHOSTNAMELEN); 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 _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 strcpy(crp->oldhost, host); 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