glibc/sunrpc/rpc_cmsg.c

/* @(#)rpc_callmsg.c	2.1 88/07/29 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[] = "@(#)rpc_callmsg.c 1.4 87/08/11 Copyr 1984 Sun Micro";
#endif

/*
 * rpc_callmsg.c
 *
 * Copyright (C) 1984, Sun Microsystems, Inc.
 *
 */

#include <string.h>
#include <sys/param.h>
#include <rpc/rpc.h>

/*
 * XDR a call message
 */
bool_t
xdr_callmsg (XDR *xdrs, struct rpc_msg *cmsg)
{
  int32_t *buf;
  struct opaque_auth *oa;

  if (xdrs->x_op == XDR_ENCODE)
    {
      if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES)
	{
	  return (FALSE);
	}
      if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES)
	{
	  return (FALSE);
	}
      buf = XDR_INLINE (xdrs, 8 * BYTES_PER_XDR_UNIT
			+ RNDUP (cmsg->rm_call.cb_cred.oa_length)
			+ 2 * BYTES_PER_XDR_UNIT
			+ RNDUP (cmsg->rm_call.cb_verf.oa_length));
      if (buf != NULL)
	{
	  IXDR_PUT_LONG (buf, cmsg->rm_xid);
	  IXDR_PUT_ENUM (buf, cmsg->rm_direction);
	  if (cmsg->rm_direction != CALL)
	    return FALSE;
	  IXDR_PUT_LONG (buf, cmsg->rm_call.cb_rpcvers);
	  if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
	    return FALSE;
	  IXDR_PUT_LONG (buf, cmsg->rm_call.cb_prog);
	  IXDR_PUT_LONG (buf, cmsg->rm_call.cb_vers);
	  IXDR_PUT_LONG (buf, cmsg->rm_call.cb_proc);
	  oa = &cmsg->rm_call.cb_cred;
	  IXDR_PUT_ENUM (buf, oa->oa_flavor);
	  IXDR_PUT_INT32 (buf, oa->oa_length);
	  if (oa->oa_length)
	    {
	      memcpy ((caddr_t) buf, oa->oa_base, oa->oa_length);
	      buf = (int32_t *) ((char *) buf + RNDUP (oa->oa_length));
	    }
	  oa = &cmsg->rm_call.cb_verf;
	  IXDR_PUT_ENUM (buf, oa->oa_flavor);
	  IXDR_PUT_INT32 (buf, oa->oa_length);
	  if (oa->oa_length)
	    {
	      memcpy ((caddr_t) buf, oa->oa_base, oa->oa_length);
	      /* no real need....
	         buf = (long *) ((char *) buf + RNDUP(oa->oa_length));
	       */
	    }
	  return TRUE;
	}
    }
  if (xdrs->x_op == XDR_DECODE)
    {
      buf = XDR_INLINE (xdrs, 8 * BYTES_PER_XDR_UNIT);
      if (buf != NULL)
	{
	  cmsg->rm_xid = IXDR_GET_LONG (buf);
	  cmsg->rm_direction = IXDR_GET_ENUM (buf, enum msg_type);
	  if (cmsg->rm_direction != CALL)
	    {
	      return FALSE;
	    }
	  cmsg->rm_call.cb_rpcvers = IXDR_GET_LONG (buf);
	  if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
	    {
	      return FALSE;
	    }
	  cmsg->rm_call.cb_prog = IXDR_GET_LONG (buf);
	  cmsg->rm_call.cb_vers = IXDR_GET_LONG (buf);
	  cmsg->rm_call.cb_proc = IXDR_GET_LONG (buf);
	  oa = &cmsg->rm_call.cb_cred;
	  oa->oa_flavor = IXDR_GET_ENUM (buf, enum_t);
	  oa->oa_length = IXDR_GET_INT32 (buf);
	  if (oa->oa_length)
	    {
	      if (oa->oa_length > MAX_AUTH_BYTES)
		return FALSE;
	      if (oa->oa_base == NULL)
		{
		  oa->oa_base = (caddr_t)
		    mem_alloc (oa->oa_length);
		}
	      buf = XDR_INLINE (xdrs, RNDUP (oa->oa_length));
	      if (buf == NULL)
		{
		  if (xdr_opaque (xdrs, oa->oa_base,
				  oa->oa_length) == FALSE)
		    return FALSE;
		}
	      else
		{
		  memcpy (oa->oa_base, (caddr_t) buf, oa->oa_length);
		  /* no real need....
		     buf = (long *) ((char *) buf
		     + RNDUP(oa->oa_length));
		   */
		}
	    }
	  oa = &cmsg->rm_call.cb_verf;
	  buf = XDR_INLINE (xdrs, 2 * BYTES_PER_XDR_UNIT);
	  if (buf == NULL)
	    {
	      if (xdr_enum (xdrs, &oa->oa_flavor) == FALSE ||
		  xdr_u_int (xdrs, &oa->oa_length) == FALSE)
		{
		  return FALSE;
		}
	    }
	  else
	    {
	      oa->oa_flavor = IXDR_GET_ENUM (buf, enum_t);
	      oa->oa_length = IXDR_GET_INT32 (buf);
	    }
	  if (oa->oa_length)
	    {
	      if (oa->oa_length > MAX_AUTH_BYTES)
		return FALSE;
	      if (oa->oa_base == NULL)
		{
		  oa->oa_base = (caddr_t)
		    mem_alloc (oa->oa_length);
		}
	      buf = XDR_INLINE (xdrs, RNDUP (oa->oa_length));
	      if (buf == NULL)
		{
		  if (xdr_opaque (xdrs, oa->oa_base,
				  oa->oa_length) == FALSE)
		    return FALSE;
		}
	      else
		{
		  memcpy (oa->oa_base, (caddr_t) buf, oa->oa_length);
		  /* no real need...
		     buf = (long *) ((char *) buf
		     + RNDUP(oa->oa_length));
		   */
		}
	    }
	  return TRUE;
	}
    }
  if (
       xdr_u_long (xdrs, &(cmsg->rm_xid)) &&
       xdr_enum (xdrs, (enum_t *) & (cmsg->rm_direction)) &&
       (cmsg->rm_direction == CALL) &&
       xdr_u_long (xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
       (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
       xdr_u_long (xdrs, &(cmsg->rm_call.cb_prog)) &&
       xdr_u_long (xdrs, &(cmsg->rm_call.cb_vers)) &&
       xdr_u_long (xdrs, &(cmsg->rm_call.cb_proc)) &&
       xdr_opaque_auth (xdrs, &(cmsg->rm_call.cb_cred)))
    return xdr_opaque_auth (xdrs, &(cmsg->rm_call.cb_verf));
  return FALSE;
}