usr/src/uts/common/rpc/rpc_calmsg.c

   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 /*
  36  * rpc_calmsg.c
  37  */
  38
  39 #include <sys/param.h>
  40 #include <sys/types.h>
  41 #include <sys/t_lock.h>
  42 #include <sys/systm.h>
  43
  44 #include <rpc/types.h>
  45 #include <rpc/xdr.h>
  46 #include <rpc/auth.h>
  47 #include <rpc/clnt.h>
  48 #include <rpc/rpc_msg.h>
  49
  50 /*
  51  * XDR a call message
  52  */
  53 bool_t
  54 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
  55 {
  56         rpc_inline_t *buf;
  57         struct opaque_auth *oa;
  58
  59         if (xdrs->x_op == XDR_ENCODE) {
  60                 uint_t credrndup;
  61                 uint_t verfrndup;
  62
  63                 if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES)
  64                         return (FALSE);
  65                 if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES)
  66                         return (FALSE);
  67                 credrndup = RNDUP(cmsg->rm_call.cb_cred.oa_length);
  68                 verfrndup = RNDUP(cmsg->rm_call.cb_verf.oa_length);
  69                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT +
  70                     credrndup + 2 * BYTES_PER_XDR_UNIT + verfrndup);
  71                 if (buf != NULL) {
  72                         IXDR_PUT_INT32(buf, cmsg->rm_xid);
  73                         IXDR_PUT_ENUM(buf, cmsg->rm_direction);
  74                         if (cmsg->rm_direction != CALL)
  75                                 return (FALSE);
  76                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_rpcvers);
  77                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
  78                                 return (FALSE);
  79                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_prog);
  80                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_vers);
  81                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_proc);
  82                         oa = &cmsg->rm_call.cb_cred;
  83                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  84                         IXDR_PUT_INT32(buf, oa->oa_length);
  85                         if (oa->oa_length) {
  86                                 bcopy(oa->oa_base, buf, oa->oa_length);
  87                                 buf += credrndup / BYTES_PER_XDR_UNIT;
  88                                 if ((credrndup -= oa->oa_length) > 0)
  89                                         bzero((char *)buf - credrndup,
  90                                             credrndup);
  91                         }
  92                         oa = &cmsg->rm_call.cb_verf;
  93                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  94                         IXDR_PUT_INT32(buf, oa->oa_length);
  95                         if (oa->oa_length) {
  96                                 bcopy(oa->oa_base, buf, oa->oa_length);
  97                                 buf += verfrndup / BYTES_PER_XDR_UNIT;
  98                                 if ((verfrndup -= oa->oa_length) > 0)
  99                                         bzero((char *)buf - verfrndup,
 100                                             verfrndup);
 101                         }
 102                         return (TRUE);
 103                 }
 104         }
 105         if (xdrs->x_op == XDR_DECODE) {
 106                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
 107                 if (buf != NULL) {
 108                         cmsg->rm_xid = IXDR_GET_INT32(buf);
 109                         cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
 110                         if (cmsg->rm_direction != CALL)
 111                                 return (FALSE);
 112                         cmsg->rm_call.cb_rpcvers = IXDR_GET_INT32(buf);
 113                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
 114                                 return (FALSE);
 115                         cmsg->rm_call.cb_prog = IXDR_GET_INT32(buf);
 116                         cmsg->rm_call.cb_vers = IXDR_GET_INT32(buf);
 117                         cmsg->rm_call.cb_proc = IXDR_GET_INT32(buf);
 118                         oa = &cmsg->rm_call.cb_cred;
 119                         oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 120                         oa->oa_length = IXDR_GET_INT32(buf);
 121                         if (oa->oa_length) {
 122                                 if (oa->oa_length > MAX_AUTH_BYTES)
 123                                         return (FALSE);
 124                                 if (oa->oa_base == NULL)
 125                                         oa->oa_base = (caddr_t)
 126                                             mem_alloc(oa->oa_length);
 127                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 128                                 if (buf == NULL) {
 129                                         if (xdr_opaque(xdrs, oa->oa_base,
 130                                             oa->oa_length) == FALSE)
 131                                                 return (FALSE);
 132                                 } else {
 133                                         bcopy(buf, oa->oa_base, oa->oa_length);
 134                                 }
 135                         }
 136                         oa = &cmsg->rm_call.cb_verf;
 137                         buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
 138                         if (buf == NULL) {
 139                                 if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
 140                                     xdr_u_int(xdrs, &oa->oa_length) == FALSE)
 141                                         return (FALSE);
 142                         } else {
 143                                 oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 144                                 oa->oa_length = IXDR_GET_INT32(buf);
 145                         }
 146                         if (oa->oa_length) {
 147                                 if (oa->oa_length > MAX_AUTH_BYTES)
 148                                         return (FALSE);
 149                                 if (oa->oa_base == NULL)
 150                                         oa->oa_base = (caddr_t)
 151                                             mem_alloc(oa->oa_length);
 152                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 153                                 if (buf == NULL) {
 154                                         if (xdr_opaque(xdrs, oa->oa_base,
 155                                             oa->oa_length) == FALSE)
 156                                                 return (FALSE);
 157                                 } else {
 158                                         bcopy(buf, oa->oa_base, oa->oa_length);
 159                                 }
 160                         }
 161                         return (TRUE);
 162                 }
 163         }
 164
 165         if (xdr_u_int(xdrs, &(cmsg->rm_xid)) &&
 166             xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
 167             cmsg->rm_direction == CALL &&
 168             xdr_rpcvers(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
 169             cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION &&
 170             xdr_rpcprog(xdrs, &(cmsg->rm_call.cb_prog)) &&
 171             xdr_rpcvers(xdrs, &(cmsg->rm_call.cb_vers)) &&
 172             xdr_rpcproc(xdrs, &(cmsg->rm_call.cb_proc)) &&
 173             xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred)))
 174                 return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
 175
 176         return (FALSE);
 177 }