/* @(#)clnt_simple.c 2.2 88/08/01 4.0 RPCSRC */ /* * Sun RPC is a product of Sun Microsystems, Inc. and is provided for * unrestricted use provided that this legend is included on all tape * media and as a part of the software program in whole or part. Users * may copy or modify Sun RPC without charge, but are not authorized * to license or distribute it to anyone else except as part of a product or * program developed by the user. * * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun RPC is provided with no support and without any obligation on the * part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 */ #if !defined(lint) && defined(SCCSIDS) static char sccsid[] = "@(#)clnt_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro"; #endif /* * clnt_simple.c * Simplified front end to rpc. * * Copyright (C) 1984, Sun Microsystems, Inc. */ #include <alloca.h> #include <errno.h> #include <stdio.h> #include <unistd.h> #include <rpc/rpc.h> #include <sys/socket.h> #include <netdb.h> #include <string.h> struct callrpc_private_s { CLIENT *client; int socket; u_long oldprognum, oldversnum, valid; char *oldhost; }; #ifdef _RPC_THREAD_SAFE_ #define callrpc_private ((struct callrpc_private_s *)RPC_THREAD_VARIABLE(callrpc_private_s)) #else static struct callrpc_private_s *callrpc_private; #endif int callrpc (const char *host, u_long prognum, u_long versnum, u_long procnum, xdrproc_t inproc, const char *in, xdrproc_t outproc, char *out) { struct callrpc_private_s *crp = callrpc_private; struct sockaddr_in server_addr; enum clnt_stat clnt_stat; struct hostent hostbuf, *hp; struct timeval timeout, tottimeout; if (crp == 0) { crp = (struct callrpc_private_s *) calloc (1, sizeof (*crp)); if (crp == 0) return 0; callrpc_private = crp; } if (crp->oldhost == NULL) { crp->oldhost = malloc (256); crp->oldhost[0] = 0; crp->socket = RPC_ANYSOCK; } if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum && strcmp (crp->oldhost, host) == 0) { /* reuse old client */ } else { size_t buflen; char *buffer; int herr; crp->valid = 0; if (crp->socket != RPC_ANYSOCK) { (void) __close (crp->socket); crp->socket = RPC_ANYSOCK; } if (crp->client) { clnt_destroy (crp->client); crp->client = NULL; } buflen = 1024; buffer = __alloca (buflen); while (__gethostbyname_r (host, &hostbuf, buffer, buflen, &hp, &herr) != 0 || hp == NULL) if (herr != NETDB_INTERNAL || errno != ERANGE) return (int) RPC_UNKNOWNHOST; else { /* Enlarge the buffer. */ buflen *= 2; buffer = __alloca (buflen); } timeout.tv_usec = 0; timeout.tv_sec = 5; memcpy ((char *) &server_addr.sin_addr, hp->h_addr, hp->h_length); server_addr.sin_family = AF_INET; server_addr.sin_port = 0; if ((crp->client = INTUSE(clntudp_create) (&server_addr, (u_long) prognum, (u_long) versnum, timeout, &crp->socket)) == NULL) return (int) get_rpc_createerr().cf_stat; crp->valid = 1; crp->oldprognum = prognum; crp->oldversnum = versnum; (void) strncpy (crp->oldhost, host, 255); crp->oldhost[255] = '\0'; } tottimeout.tv_sec = 25; tottimeout.tv_usec = 0; clnt_stat = clnt_call (crp->client, procnum, inproc, (char *) in, outproc, out, tottimeout); /* * if call failed, empty cache */ if (clnt_stat != RPC_SUCCESS) crp->valid = 0; return (int) clnt_stat; } #ifdef _RPC_THREAD_SAFE_ void __rpc_thread_clnt_cleanup (void) { struct callrpc_private_s *rcp = RPC_THREAD_VARIABLE(callrpc_private_s); if (rcp) { if (rcp->client) CLNT_DESTROY (rcp->client); free (rcp); } } #endif /* _RPC_THREAD_SAFE_ */