xref: /freebsd/crypto/krb5/src/lib/rpc/rpc_callmsg.c (revision 7f2fe78b9dd5f51c821d771b63d2e096f6fd49e9)

/* @(#)rpc_callmsg.c	2.1 88/07/29 4.0 RPCSRC */
/*
 * Copyright (c) 2010, Oracle America, 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 the "Oracle America, 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.
 */
#if !defined(lint) && defined(SCCSIDS)
static char sccsid[] = "@(#)rpc_callmsg.c 1.4 87/08/11 Copyr 1984 Sun Micro";
#endif

/*
 * rpc_callmsg.c
 */

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

/*
 * XDR a call message
 */
bool_t
xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
{
	rpc_inline_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 = (rpc_inline_t *) XDR_INLINE(xdrs, (int) (
		        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_LONG(buf, oa->oa_length);
			if (oa->oa_length) {
				memmove((caddr_t)buf, oa->oa_base,
					oa->oa_length);
				buf += RNDUP(oa->oa_length) / BYTES_PER_XDR_UNIT;
			}
			oa = &cmsg->rm_call.cb_verf;
			IXDR_PUT_ENUM(buf, oa->oa_flavor);
			IXDR_PUT_LONG(buf, oa->oa_length);
			if (oa->oa_length) {
				memmove((caddr_t)buf, oa->oa_base,
					oa->oa_length);
				/* no real need....
				buf += RNDUP(oa->oa_length) / BYTES_PER_XDR_UNIT;
				*/
			}
			return (TRUE);
		}
	}
	if (xdrs->x_op == XDR_DECODE) {
		buf = (rpc_inline_t *) 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_LONG(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 = (rpc_inline_t *)
				   XDR_INLINE(xdrs, (int)RNDUP(oa->oa_length));
				if (buf == NULL) {
					if (xdr_opaque(xdrs, oa->oa_base,
					    oa->oa_length) == FALSE) {
						return (FALSE);
					}
				} else {
					memmove(oa->oa_base, (caddr_t)buf,
						oa->oa_length);
					/* no real need....
					buf += RNDUP(oa->oa_length) /
						BYTES_PER_XDR_UNIT;
					*/
				}
			}
			oa = &cmsg->rm_call.cb_verf;
			buf = (rpc_inline_t *)
			   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_LONG(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 = (rpc_inline_t *)
				   XDR_INLINE(xdrs, (int)RNDUP(oa->oa_length));
				if (buf == NULL) {
					if (xdr_opaque(xdrs, oa->oa_base,
					    oa->oa_length) == FALSE) {
						return (FALSE);
					}
				} else {
					memmove(oa->oa_base, (caddr_t) buf,
					    oa->oa_length);
					/* no real need...
					buf += RNDUP(oa->oa_length) /
						BYTES_PER_XDR_UNIT;
					*/
				}
			}
			return (TRUE);
		}
	}
	if (
	    xdr_u_int32(xdrs, &(cmsg->rm_xid)) &&
	    xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
	    (cmsg->rm_direction == CALL) &&
	    xdr_u_int32(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
	    (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
	    xdr_u_int32(xdrs, &(cmsg->rm_call.cb_prog)) &&
	    xdr_u_int32(xdrs, &(cmsg->rm_call.cb_vers)) &&
	    xdr_u_int32(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);
}