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/* @(#)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 0

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.

 */

#define __FORCE_GLIBC

#include <features.h>

#include <alloca.h>

#include <errno.h>

#include <stdio.h>

#include <unistd.h>

#include "rpc_private.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 __UCLIBC_HAS_THREADS__

#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 = 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 __UCLIBC_HAS_THREADS__

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 /* __UCLIBC_HAS_THREADS__ */