usr/src/lib/libc/port/nsl/rpc_callmsg.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 /*
  24  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  25  * Use is subject to license terms.
  26  */
  27
  28 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
  29 /* All Rights Reserved */
  30 /*
  31  * Portions of this source code were derived from Berkeley
  32  * 4.3 BSD under license from the Regents of the University of
  33  * California.
  34  */
  35
  36 #include "mt.h"
  37 #include <stdlib.h>
  38 #include <sys/param.h>
  39 #include <rpc/rpc.h>
  40 #include <syslog.h>
  41 #include <sys/byteorder.h>
  42
  43 extern bool_t xdr_opaque_auth(XDR *, struct opaque_auth *);
  44
  45 /*
  46  * XDR a call message
  47  */
  48 bool_t
  49 xdr_callmsg(XDR *xdrs, struct rpc_msg *cmsg)
  50 {
  51         rpc_inline_t *buf;
  52         struct opaque_auth *oa;
  53
  54         if (xdrs->x_op == XDR_ENCODE) {
  55                 uint_t credrndup;
  56                 uint_t verfrndup;
  57
  58                 if (cmsg->rm_call.cb_cred.oa_length > MAX_AUTH_BYTES)
  59                         return (FALSE);
  60                 if (cmsg->rm_call.cb_verf.oa_length > MAX_AUTH_BYTES)
  61                         return (FALSE);
  62                 credrndup = RNDUP(cmsg->rm_call.cb_cred.oa_length);
  63                 verfrndup = RNDUP(cmsg->rm_call.cb_verf.oa_length);
  64                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT +
  65                     credrndup + 2 * BYTES_PER_XDR_UNIT + verfrndup);
  66                 if (buf != NULL) {
  67                         IXDR_PUT_INT32(buf, cmsg->rm_xid);
  68                         IXDR_PUT_ENUM(buf, cmsg->rm_direction);
  69                         if (cmsg->rm_direction != CALL)
  70                                 return (FALSE);
  71                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_rpcvers);
  72                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
  73                                 return (FALSE);
  74                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_prog);
  75                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_vers);
  76                         IXDR_PUT_INT32(buf, cmsg->rm_call.cb_proc);
  77                         oa = &cmsg->rm_call.cb_cred;
  78                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  79                         IXDR_PUT_INT32(buf, oa->oa_length);
  80                         if (oa->oa_length) {
  81                                 (void) memcpy(buf, oa->oa_base, oa->oa_length);
  82                                 buf += credrndup / BYTES_PER_XDR_UNIT;
  83                                 if ((credrndup -= oa->oa_length) > 0)
  84                                         (void) memset((char *)buf - credrndup,
  85                                             0, credrndup);
  86                         }
  87                         oa = &cmsg->rm_call.cb_verf;
  88                         IXDR_PUT_ENUM(buf, oa->oa_flavor);
  89                         IXDR_PUT_INT32(buf, oa->oa_length);
  90                         if (oa->oa_length) {
  91                                 (void) memcpy(buf, oa->oa_base, oa->oa_length);
  92                                 buf += verfrndup / BYTES_PER_XDR_UNIT;
  93                                 if ((verfrndup -= oa->oa_length) > 0)
  94                                         (void) memset((char *)buf - verfrndup,
  95                                             0, verfrndup);
  96                         }
  97                         return (TRUE);
  98                 }
  99         }
 100         if (xdrs->x_op == XDR_DECODE) {
 101                 buf = XDR_INLINE(xdrs, 8 * BYTES_PER_XDR_UNIT);
 102                 if (buf != NULL) {
 103                         cmsg->rm_xid = IXDR_GET_INT32(buf);
 104                         cmsg->rm_direction = IXDR_GET_ENUM(buf, enum msg_type);
 105                         if (cmsg->rm_direction != CALL)
 106                                 return (FALSE);
 107                         cmsg->rm_call.cb_rpcvers = IXDR_GET_INT32(buf);
 108                         if (cmsg->rm_call.cb_rpcvers != RPC_MSG_VERSION)
 109                                 return (FALSE);
 110                         cmsg->rm_call.cb_prog = IXDR_GET_INT32(buf);
 111                         cmsg->rm_call.cb_vers = IXDR_GET_INT32(buf);
 112                         cmsg->rm_call.cb_proc = IXDR_GET_INT32(buf);
 113                         oa = &cmsg->rm_call.cb_cred;
 114                         oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 115                         oa->oa_length = IXDR_GET_INT32(buf);
 116                         if (oa->oa_length) {
 117                                 if (oa->oa_length > MAX_AUTH_BYTES)
 118                                         return (FALSE);
 119                                 if (oa->oa_base == NULL) {
 120                                         oa->oa_base = malloc(oa->oa_length);
 121                                         if (oa->oa_base == NULL) {
 122                                                 syslog(LOG_ERR, "xdr_callmsg : "
 123                                                     "out of memory.");
 124                                                 return (FALSE);
 125                                         }
 126                                 }
 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                                         (void) memcpy(oa->oa_base,
 134                                             buf, (size_t)oa->oa_length);
 135                                         /*
 136                                          * no real need....
 137                                          * buf += RNDUP(oa->oa_length) /
 138                                          *      (int)sizeof (int32_t);
 139                                          */
 140                                 }
 141                         }
 142                         oa = &cmsg->rm_call.cb_verf;
 143                         buf = XDR_INLINE(xdrs, 2 * BYTES_PER_XDR_UNIT);
 144                         if (buf == NULL) {
 145                                 if (xdr_enum(xdrs, &oa->oa_flavor) == FALSE ||
 146                                     xdr_u_int(xdrs, &oa->oa_length) == FALSE)
 147                                         return (FALSE);
 148                         } else {
 149                                 oa->oa_flavor = IXDR_GET_ENUM(buf, enum_t);
 150                                 oa->oa_length = IXDR_GET_INT32(buf);
 151                         }
 152                         if (oa->oa_length) {
 153                                 if (oa->oa_length > MAX_AUTH_BYTES)
 154                                         return (FALSE);
 155                                 if (oa->oa_base == NULL) {
 156                                         oa->oa_base = malloc(oa->oa_length);
 157                                         if (oa->oa_base == NULL) {
 158                                                 syslog(LOG_ERR, "xdr_callmsg : "
 159                                                     "out of memory.");
 160                                                 return (FALSE);
 161                                         }
 162                                 }
 163                                 buf = XDR_INLINE(xdrs, RNDUP(oa->oa_length));
 164                                 if (buf == NULL) {
 165                                         if (xdr_opaque(xdrs, oa->oa_base,
 166                                             oa->oa_length) == FALSE)
 167                                                 return (FALSE);
 168                                 } else {
 169                                         (void) memcpy(oa->oa_base,
 170                                             buf, (size_t)oa->oa_length);
 171                                         /*
 172                                          * no real need...
 173                                          * buf += RNDUP(oa->oa_length) /
 174                                          *      (int)sizeof (int32_t);
 175                                          */
 176                                 }
 177                         }
 178                         return (TRUE);
 179                 }
 180         }
 181         if (xdr_u_int(xdrs, &(cmsg->rm_xid)) &&
 182             xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
 183             (cmsg->rm_direction == CALL) &&
 184             xdr_u_int(xdrs, (uint_t *)&(cmsg->rm_call.cb_rpcvers)) &&
 185             (cmsg->rm_call.cb_rpcvers == RPC_MSG_VERSION) &&
 186             xdr_u_int(xdrs, (uint_t *)&(cmsg->rm_call.cb_prog)) &&
 187             xdr_u_int(xdrs, (uint_t *)&(cmsg->rm_call.cb_vers)) &&
 188             xdr_u_int(xdrs, (uint_t *)&(cmsg->rm_call.cb_proc)) &&
 189             xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_cred))) {
 190                 return (xdr_opaque_auth(xdrs, &(cmsg->rm_call.cb_verf)));
 191         }
 192         return (FALSE);
 193 }