/*

 * 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. 

 */

/*

 * rpcb_prot.c

 * XDR routines for the rpcbinder version 3.

 *

 * Copyright (C) 1984, 1988, Sun Microsystems, Inc.

 */

#include <rpc/rpc.h>

#include <rpc/types.h>

#include <rpc/xdr.h>

#include <rpc/rpcb_prot.h>

#include "rpc_com.h"

bool_t

xdr_rpcb(xdrs, objp)

	XDR *xdrs;

	RPCB *objp;

{

	if (!xdr_u_int32_t(xdrs, &objp->r_prog)) {

		return (FALSE);

	}

	if (!xdr_u_int32_t(xdrs, &objp->r_vers)) {

		return (FALSE);

	}

	if (!xdr_string(xdrs, &objp->r_netid, RPC_MAXDATASIZE)) {

		return (FALSE);

	}

	if (!xdr_string(xdrs, &objp->r_addr, RPC_MAXDATASIZE)) {

		return (FALSE);

	}

	if (!xdr_string(xdrs, &objp->r_owner, RPC_MAXDATASIZE)) {

		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(xdrs, rp)

	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)

			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 {

			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(xdrs, rp)

	XDR *xdrs;

	RPCBLIST **rp;

{

	bool_t	dummy;

	dummy = xdr_rpcblist_ptr(xdrs, (rpcblist_ptr *)rp);

	return (dummy);

}

bool_t

xdr_rpcb_entry(xdrs, objp)

	XDR *xdrs;

	rpcb_entry *objp;

{

	if (!xdr_string(xdrs, &objp->r_maddr, RPC_MAXDATASIZE)) {

		return (FALSE);

	}

	if (!xdr_string(xdrs, &objp->r_nc_netid, RPC_MAXDATASIZE)) {

		return (FALSE);

	}

	if (!xdr_u_int32_t(xdrs, &objp->r_nc_semantics)) {

		return (FALSE);

	}

	if (!xdr_string(xdrs, &objp->r_nc_protofmly, RPC_MAXDATASIZE)) {

		return (FALSE);

	}

	if (!xdr_string(xdrs, &objp->r_nc_proto, RPC_MAXDATASIZE)) {

		return (FALSE);

	}

	return (TRUE);

}

bool_t

xdr_rpcb_entry_list_ptr(xdrs, rp)

	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)

			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 {

			rp = &((*rp)->rpcb_entry_next);

		}

	}

	/*NOTREACHED*/

}

/*

 * XDR remote call arguments

 * written for XDR_ENCODE direction only

 */

bool_t

xdr_rpcb_rmtcallargs(xdrs, p)

	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_u_int32_t(xdrs, &objp->prog)) {

			return (FALSE);

		}

		if (!xdr_u_int32_t(xdrs, &objp->vers)) {

			return (FALSE);

		}

		if (!xdr_u_int32_t(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(xdrs, p)

	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, RPC_MAXDATASIZE)) {

		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(xdrs, objp)

	XDR *xdrs;

	struct netbuf *objp;

{

	bool_t dummy;

	if (!xdr_u_int32_t(xdrs, (u_int32_t *) &objp->maxlen)) {

		return (FALSE);

	}

	if (objp->maxlen > RPC_MAXDATASIZE) {

		return (FALSE);

	}

	dummy = xdr_bytes(xdrs, (char **)&(objp->buf),

			(u_int *)&(objp->len), objp->maxlen);

	return (dummy);

}