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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 /*	Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T	*/
     28 /*	  All Rights Reserved  	*/
     29 
     30 /*
     31  * Portions of this source code were derived from Berkeley 4.3 BSD
     32  * under license from the Regents of the University of California.
     33  */
     34 
     35 #pragma ident	"@(#)rpc_calmsg.c	1.17	05/06/08 SMI"
     36 
     37 /*
     38  * rpc_calmsg.c
     39  */
     40 
     41 #include <sys/param.h>
     42 #include <sys/types.h>
     43 #include <sys/t_lock.h>
     44 #include <sys/systm.h>
     45 
     46 #include <rpc/types.h>
     47 #include <rpc/xdr.h>
     48 #include <rpc/auth.h>
     49 #include <rpc/clnt.h>
     50 #include <rpc/rpc_msg.h>
     51 
     52 /*
     53  * XDR a call message
     54  */
     55 bool_t
     56 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
     57 {
     58 	int32_t *buf;
     59 	struct opaque_auth *oa;
     60 
     61 	if (xdrs->x_op == XDR_ENCODE) {
     62 		if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES)
     63 			return (FALSE);
     64 		if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES)
     65 			return (FALSE);
     66 		buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT +
     67 		    RNDUP(cmsg->rm_call.cb_cred.oa_length) +
     68 		    2 * BYTES_PER_XDR_UNIT +
     69 		    RNDUP(cmsg->rm_call.cb_verf.oa_length));
     70 		if (buf != NULL) {
     71 			IXDR_PUT_INT32(buf, cmsg->rm_xid);
     72 			IXDR_PUT_ENUM(buf, cmsg->rm_direction);
     73 			if (cmsg->rm_direction != CALL)
     74 				return (FALSE);
     75 			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_rpcvers);
     76 			if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
     77 				return (FALSE);
     78 			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_prog);
     79 			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_vers);
     80 			IXDR_PUT_INT32(buf, cmsg->rm_call.cb_proc);
     81 			oa = &cmsg->rm_call.cb_cred;
     82 			IXDR_PUT_ENUM(buf, oa->oa_flavor);
     83 			IXDR_PUT_INT32(buf, oa->oa_length);
     84 			if (oa->oa_length) {
     85 				bcopy(oa->oa_base, buf, oa->oa_length);
     86 				buf += RNDUP(oa->oa_length) / sizeof (int32_t);
     87 			}
     88 			oa = &cmsg->rm_call.cb_verf;
     89 			IXDR_PUT_ENUM(buf, oa->oa_flavor);
     90 			IXDR_PUT_INT32(buf, oa->oa_length);
     91 			if (oa->oa_length)
     92 				bcopy(oa->oa_base, buf, oa->oa_length);
     93 			return (TRUE);
     94 		}
     95 	}
     96 	if (xdrs->x_op == XDR_DECODE) {
     97 		buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
     98 		if (buf != NULL) {
     99 			cmsg->rm_xid = IXDR_GET_INT32(buf);
    100 			cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
    101 			if (cmsg->rm_direction != CALL)
    102 				return (FALSE);
    103 			cmsg->rm_call.cb_rpcvers = IXDR_GET_INT32(buf);
    104 			if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
    105 				return (FALSE);
    106 			cmsg->rm_call.cb_prog = IXDR_GET_INT32(buf);
    107 			cmsg->rm_call.cb_vers = IXDR_GET_INT32(buf);
    108 			cmsg->rm_call.cb_proc = IXDR_GET_INT32(buf);
    109 			oa = &cmsg->rm_call.cb_cred;
    110 			oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
    111 			oa->oa_length = IXDR_GET_INT32(buf);
    112 			if (oa->oa_length) {
    113 				if (oa->oa_length > MAX_AUTH_BYTES)
    114 					return (FALSE);
    115 				if (oa->oa_base == NULL)
    116 					oa->oa_base = (caddr_t)
    117 					    mem_alloc(oa->oa_length);
    118 				buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
    119 				if (buf == NULL) {
    120 					if (xdr_opaque(xdrs, oa->oa_base,
    121 					    oa->oa_length) == FALSE)
    122 						return (FALSE);
    123 				} else {
    124 					bcopy(buf, oa->oa_base, oa->oa_length);
    125 				}
    126 			}
    127 			oa = &cmsg->rm_call.cb_verf;
    128 			buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
    129 			if (buf == NULL) {
    130 				if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
    131 				    xdr_u_int(xdrs, &oa->oa_length) == FALSE)
    132 					return (FALSE);
    133 			} else {
    134 				oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
    135 				oa->oa_length = IXDR_GET_INT32(buf);
    136 			}
    137 			if (oa->oa_length) {
    138 				if (oa->oa_length > MAX_AUTH_BYTES)
    139 					return (FALSE);
    140 				if (oa->oa_base == NULL)
    141 					oa->oa_base = (caddr_t)
    142 					    mem_alloc(oa->oa_length);
    143 				buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
    144 				if (buf == NULL) {
    145 					if (xdr_opaque(xdrs, oa->oa_base,
    146 					    oa->oa_length) == FALSE)
    147 						return (FALSE);
    148 				} else {
    149 					bcopy(buf, oa->oa_base, oa->oa_length);
    150 				}
    151 			}
    152 			return (TRUE);
    153 		}
    154 	}
    155 
    156 	if (xdr_u_int(xdrs, &(cmsg->rm_xid)) &&
    157 	    xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
    158 	    cmsg->rm_direction == CALL &&
    159 	    xdr_rpcvers(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
    160 	    cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION &&
    161 	    xdr_rpcprog(xdrs, &(cmsg->rm_call.cb_prog)) &&
    162 	    xdr_rpcvers(xdrs, &(cmsg->rm_call.cb_vers)) &&
    163 	    xdr_rpcproc(xdrs, &(cmsg->rm_call.cb_proc)) &&
    164 	    xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)))
    165 		return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
    166 
    167 	return (FALSE);
    168 }
    169