text: /*	$NetBSD: rpcb_prot.c,v 1.3 2000/07/14 08:40:42 fvdl Exp $	*/
  
  /*-
   * Copyright (c) 2009, Sun Microsystems, Inc.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without 
   * modification, are permitted provided that the following conditions are met:
   * - Redistributions of source code must retain the above copyright notice, 
   *   this list of conditions and the following disclaimer.
   * - Redistributions in binary form must reproduce the above copyright notice, 
   *   this list of conditions and the following disclaimer in the documentation 
   *   and/or other materials provided with the distribution.
   * - Neither the name of Sun Microsystems, Inc. nor the names of its 
   *   contributors may be used to endorse or promote products derived 
   *   from this software without specific prior written permission.
   * 
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
   * POSSIBILITY OF SUCH DAMAGE.
   */
  /*
   * Copyright (c) 1986-1991 by Sun Microsystems Inc. 
   */
  
  /* #ident	"@(#)rpcb_prot.c	1.13	94/04/24 SMI" */
  
  #if defined(LIBC_SCCS) && !defined(lint)
  static char sccsid[] = "@(#)rpcb_prot.c 1.9 89/04/21 Copyr 1984 Sun Micro";
  #endif
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: releng/11.0/lib/libc/rpc/rpcb_prot.c 301754 2016-06-09 19:44:47Z pfg $");
  
  /*
   * rpcb_prot.c
   * XDR routines for the rpcbinder version 3.
   *
   * Copyright (C) 1984, 1988, Sun Microsystems, Inc.
   */
  
  #include "namespace.h"
  #include <rpc/rpc.h>
  #include <rpc/types.h>
  #include <rpc/xdr.h>
  #include <rpc/rpcb_prot.h>
  #include "un-namespace.h"
  
  bool_t
  xdr_rpcb(XDR *xdrs, RPCB *objp)
  {
  	if (!xdr_rpcprog(xdrs, &objp->r_prog)) {
  		return (FALSE);
  	}
  	if (!xdr_rpcvers(xdrs, &objp->r_vers)) {
  		return (FALSE);
  	}
  	if (!xdr_string(xdrs, &objp->r_netid, (u_int)~0)) {
  		return (FALSE);
  	}
  	if (!xdr_string(xdrs, &objp->r_addr, (u_int)~0)) {
  		return (FALSE);
  	}
  	if (!xdr_string(xdrs, &objp->r_owner, (u_int)~0)) {
  		return (FALSE);
  	}
  	return (TRUE);
  }
  
  /*
   * rpcblist_ptr implements a linked list.  The RPCL definition from
   * rpcb_prot.x is:
   *
   * struct rpcblist {
   * 	rpcb		rpcb_map;
   *	struct rpcblist *rpcb_next;
   * };
   * typedef rpcblist *rpcblist_ptr;
   *
   * Recall that "pointers" in XDR are encoded as a boolean, indicating whether
   * there's any data behind the pointer, followed by the data (if any exists).
   * The boolean can be interpreted as ``more data follows me''; if FALSE then
   * nothing follows the boolean; if TRUE then the boolean is followed by an
   * actual struct rpcb, and another rpcblist_ptr (declared in RPCL as "struct
   * rpcblist *").
   *
   * This could be implemented via the xdr_pointer type, though this would
   * result in one recursive call per element in the list.  Rather than do that
   * we can ``unwind'' the recursion into a while loop and use xdr_reference to
   * serialize the rpcb elements.
   */
  
  bool_t
  xdr_rpcblist_ptr(XDR *xdrs, rpcblist_ptr *rp)
  {
  	/*
  	 * more_elements is pre-computed in case the direction is
  	 * XDR_ENCODE or XDR_FREE.  more_elements is overwritten by
  	 * xdr_bool when the direction is XDR_DECODE.
  	 */
  	bool_t more_elements;
  	int freeing = (xdrs->x_op == XDR_FREE);
  	rpcblist_ptr next;
  	rpcblist_ptr next_copy;
  
  	next = NULL;
  	for (;;) {
  		more_elements = (bool_t)(*rp != NULL);
  		if (! xdr_bool(xdrs, &more_elements)) {
  			return (FALSE);
  		}
  		if (! more_elements) {
  			return (TRUE);  /* we are done */
  		}
  		/*
  		 * the unfortunate side effect of non-recursion is that in
  		 * the case of freeing we must remember the next object
  		 * before we free the current object ...
  		 */
  		if (freeing && *rp)
  			next = (*rp)->rpcb_next;
  		if (! xdr_reference(xdrs, (caddr_t *)rp,
  		    (u_int)sizeof (rpcblist), (xdrproc_t)xdr_rpcb)) {
  			return (FALSE);
  		}
  		if (freeing) {
  			next_copy = next;
  			rp = &next_copy;
  			/*
  			 * Note that in the subsequent iteration, next_copy
  			 * gets nulled out by the xdr_reference
  			 * but next itself survives.
  			 */
  		} else if (*rp) {
  			rp = &((*rp)->rpcb_next);
  		}
  	}
  	/*NOTREACHED*/
  }
  
  /*
   * xdr_rpcblist() is specified to take a RPCBLIST **, but is identical in
   * functionality to xdr_rpcblist_ptr().
   */
  bool_t
  xdr_rpcblist(XDR *xdrs, RPCBLIST **rp)
  {
  	bool_t	dummy;
  
  	dummy = xdr_rpcblist_ptr(xdrs, (rpcblist_ptr *)rp);
  	return (dummy);
  }
  
  
  bool_t
  xdr_rpcb_entry(XDR *xdrs, rpcb_entry *objp)
  {
  	if (!xdr_string(xdrs, &objp->r_maddr, (u_int)~0)) {
  		return (FALSE);
  	}
  	if (!xdr_string(xdrs, &objp->r_nc_netid, (u_int)~0)) {
  		return (FALSE);
  	}
  	if (!xdr_u_int32_t(xdrs, &objp->r_nc_semantics)) {
  		return (FALSE);
  	}
  	if (!xdr_string(xdrs, &objp->r_nc_protofmly, (u_int)~0)) {
  		return (FALSE);
  	}
  	if (!xdr_string(xdrs, &objp->r_nc_proto, (u_int)~0)) {
  		return (FALSE);
  	}
  	return (TRUE);
  }
  
  bool_t
  xdr_rpcb_entry_list_ptr(XDR *xdrs, rpcb_entry_list_ptr *rp)
  {
  	/*
  	 * more_elements is pre-computed in case the direction is
  	 * XDR_ENCODE or XDR_FREE.  more_elements is overwritten by
  	 * xdr_bool when the direction is XDR_DECODE.
  	 */
  	bool_t more_elements;
  	int freeing = (xdrs->x_op == XDR_FREE);
  	rpcb_entry_list_ptr next;
  	rpcb_entry_list_ptr next_copy;
  
  	next = NULL;
  	for (;;) {
  		more_elements = (bool_t)(*rp != NULL);
  		if (! xdr_bool(xdrs, &more_elements)) {
  			return (FALSE);
  		}
  		if (! more_elements) {
  			return (TRUE);  /* we are done */
  		}
  		/*
  		 * the unfortunate side effect of non-recursion is that in
  		 * the case of freeing we must remember the next object
  		 * before we free the current object ...
  		 */
  		if (freeing && *rp)
  			next = (*rp)->rpcb_entry_next;
  		if (! xdr_reference(xdrs, (caddr_t *)rp,
  		    (u_int)sizeof (rpcb_entry_list),
  				    (xdrproc_t)xdr_rpcb_entry)) {
  			return (FALSE);
  		}
  		if (freeing) {
  			next_copy = next;
  			rp = &next_copy;
  			/*
  			 * Note that in the subsequent iteration, next_copy
  			 * gets nulled out by the xdr_reference
  			 * but next itself survives.
  			 */
  		} else if (*rp) {
  			rp = &((*rp)->rpcb_entry_next);
  		}
  	}
  	/*NOTREACHED*/
  }
  
  /*
   * XDR remote call arguments
   * written for XDR_ENCODE direction only
   */
  bool_t
  xdr_rpcb_rmtcallargs(XDR *xdrs, struct rpcb_rmtcallargs *p)
  {
  	struct r_rpcb_rmtcallargs *objp =
  	    (struct r_rpcb_rmtcallargs *)(void *)p;
  	u_int lenposition, argposition, position;
  	int32_t *buf;
  
  	buf = XDR_INLINE(xdrs, 3 * BYTES_PER_XDR_UNIT);
  	if (buf == NULL) {
  		if (!xdr_rpcprog(xdrs, &objp->prog)) {
  			return (FALSE);
  		}
  		if (!xdr_rpcvers(xdrs, &objp->vers)) {
  			return (FALSE);
  		}
  		if (!xdr_rpcproc(xdrs, &objp->proc)) {
  			return (FALSE);
  		}
  	} else {
  		IXDR_PUT_U_INT32(buf, objp->prog);
  		IXDR_PUT_U_INT32(buf, objp->vers);
  		IXDR_PUT_U_INT32(buf, objp->proc);
  	}
  
  	/*
  	 * All the jugglery for just getting the size of the arguments
  	 */
  	lenposition = XDR_GETPOS(xdrs);
  	if (! xdr_u_int(xdrs, &(objp->args.args_len))) {
  		return (FALSE);
  	}
  	argposition = XDR_GETPOS(xdrs);
  	if (! (*objp->xdr_args)(xdrs, objp->args.args_val)) {
  		return (FALSE);
  	}
  	position = XDR_GETPOS(xdrs);
  	objp->args.args_len = (u_int)((u_long)position - (u_long)argposition);
  	XDR_SETPOS(xdrs, lenposition);
  	if (! xdr_u_int(xdrs, &(objp->args.args_len))) {
  		return (FALSE);
  	}
  	XDR_SETPOS(xdrs, position);
  	return (TRUE);
  }
  
  /*
   * XDR remote call results
   * written for XDR_DECODE direction only
   */
  bool_t
  xdr_rpcb_rmtcallres(XDR *xdrs, struct rpcb_rmtcallres *p)
  {
  	bool_t dummy;
  	struct r_rpcb_rmtcallres *objp = (struct r_rpcb_rmtcallres *)(void *)p;
  
  	if (!xdr_string(xdrs, &objp->addr, (u_int)~0)) {
  		return (FALSE);
  	}
  	if (!xdr_u_int(xdrs, &objp->results.results_len)) {
  		return (FALSE);
  	}
  	dummy = (*(objp->xdr_res))(xdrs, objp->results.results_val);
  	return (dummy);
  }
  
  bool_t
  xdr_netbuf(XDR *xdrs, struct netbuf *objp)
  {
  	bool_t dummy;
  	void **pp;
  
  	if (!xdr_u_int32_t(xdrs, (u_int32_t *) &objp->maxlen)) {
  		return (FALSE);
  	}
  	pp = &objp->buf;
  	dummy = xdr_bytes(xdrs, (char **) pp,
  			(u_int *)&(objp->len), objp->maxlen);
  	return (dummy);
  }
  