| /* @(#)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 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_ */ |