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/*
* rpc_prot.c
*
* Copyright (c) 2010, Oracle America, Inc.
*
* 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.
*
* This set of routines implements the rpc message definition,
* its serializer and some common rpc utility routines.
* The routines are meant for various implementations of rpc -
* they are NOT for the rpc client or rpc service implementations!
* Because authentication stuff is easy and is part of rpc, the opaque
* routines are also in this program.
*/
#include <sys/param.h>
#include <rpc/rpc.h>
/* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */
/*
* XDR an opaque authentication struct
* (see auth.h)
*/
bool_t
xdr_opaque_auth (XDR *xdrs, struct opaque_auth *ap)
{
if (xdr_enum (xdrs, &(ap->oa_flavor)))
return xdr_bytes (xdrs, &ap->oa_base,
&ap->oa_length, MAX_AUTH_BYTES);
return FALSE;
}
libc_hidden_nolink_sunrpc (xdr_opaque_auth, GLIBC_2_0)
/*
* XDR a DES block
*/
bool_t
xdr_des_block (XDR *xdrs, des_block *blkp)
{
return xdr_opaque (xdrs, (caddr_t) blkp, sizeof (des_block));
}
libc_hidden_nolink_sunrpc (xdr_des_block, GLIBC_2_0)
/* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */
/*
* XDR the MSG_ACCEPTED part of a reply message union
*/
bool_t
xdr_accepted_reply (XDR *xdrs, struct accepted_reply *ar)
{
/* personalized union, rather than calling xdr_union */
if (!xdr_opaque_auth (xdrs, &(ar->ar_verf)))
return FALSE;
if (!xdr_enum (xdrs, (enum_t *) & (ar->ar_stat)))
return FALSE;
switch (ar->ar_stat)
{
case SUCCESS:
return ((*(ar->ar_results.proc)) (xdrs, ar->ar_results.where));
case PROG_MISMATCH:
if (!xdr_u_long (xdrs, &(ar->ar_vers.low)))
return FALSE;
return (xdr_u_long (xdrs, &(ar->ar_vers.high)));
default:
return TRUE;
}
return TRUE; /* TRUE => open ended set of problems */
}
libc_hidden_nolink_sunrpc (xdr_accepted_reply, GLIBC_2_0)
/*
* XDR the MSG_DENIED part of a reply message union
*/
bool_t
xdr_rejected_reply (XDR *xdrs, struct rejected_reply *rr)
{
/* personalized union, rather than calling xdr_union */
if (!xdr_enum (xdrs, (enum_t *) & (rr->rj_stat)))
return FALSE;
switch (rr->rj_stat)
{
case RPC_MISMATCH:
if (!xdr_u_long (xdrs, &(rr->rj_vers.low)))
return FALSE;
return xdr_u_long (xdrs, &(rr->rj_vers.high));
case AUTH_ERROR:
return xdr_enum (xdrs, (enum_t *) & (rr->rj_why));
}
return FALSE;
}
libc_hidden_nolink_sunrpc (xdr_rejected_reply, GLIBC_2_0)
static const struct xdr_discrim reply_dscrm[3] =
{
{(int) MSG_ACCEPTED, (xdrproc_t) xdr_accepted_reply},
{(int) MSG_DENIED, (xdrproc_t) xdr_rejected_reply},
{__dontcare__, NULL_xdrproc_t}};
/*
* XDR a reply message
*/
bool_t
xdr_replymsg (XDR *xdrs, struct rpc_msg *rmsg)
{
if (xdr_u_long (xdrs, &(rmsg->rm_xid)) &&
xdr_enum (xdrs, (enum_t *) & (rmsg->rm_direction)) &&
(rmsg->rm_direction == REPLY))
return xdr_union (xdrs, (enum_t *) & (rmsg->rm_reply.rp_stat),
(caddr_t) & (rmsg->rm_reply.ru), reply_dscrm,
NULL_xdrproc_t);
return FALSE;
}
libc_hidden_nolink_sunrpc (xdr_replymsg, GLIBC_2_0)
/*
* Serializes the "static part" of a call message header.
* The fields include: rm_xid, rm_direction, rpcvers, prog, and vers.
* The rm_xid is not really static, but the user can easily munge on the fly.
*/
bool_t
xdr_callhdr (XDR *xdrs, struct rpc_msg *cmsg)
{
cmsg->rm_direction = CALL;
cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION;
if (
(xdrs->x_op == XDR_ENCODE) &&
xdr_u_long (xdrs, &(cmsg->rm_xid)) &&
xdr_enum (xdrs, (enum_t *) & (cmsg->rm_direction)) &&
xdr_u_long (xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
xdr_u_long (xdrs, &(cmsg->rm_call.cb_prog)))
return xdr_u_long (xdrs, &(cmsg->rm_call.cb_vers));
return FALSE;
}
libc_hidden_nolink_sunrpc (xdr_callhdr, GLIBC_2_0)
/* ************************** Client utility routine ************* */
static void
accepted (enum accept_stat acpt_stat,
struct rpc_err *error)
{
switch (acpt_stat)
{
case PROG_UNAVAIL:
error->re_status = RPC_PROGUNAVAIL;
return;
case PROG_MISMATCH:
error->re_status = RPC_PROGVERSMISMATCH;
return;
case PROC_UNAVAIL:
error->re_status = RPC_PROCUNAVAIL;
return;
case GARBAGE_ARGS:
error->re_status = RPC_CANTDECODEARGS;
return;
case SYSTEM_ERR:
error->re_status = RPC_SYSTEMERROR;
return;
case SUCCESS:
error->re_status = RPC_SUCCESS;
return;
}
/* something's wrong, but we don't know what ... */
error->re_status = RPC_FAILED;
error->re_lb.s1 = (long) MSG_ACCEPTED;
error->re_lb.s2 = (long) acpt_stat;
}
static void
rejected (enum reject_stat rjct_stat,
struct rpc_err *error)
{
switch (rjct_stat)
{
case RPC_MISMATCH:
error->re_status = RPC_VERSMISMATCH;
return;
case AUTH_ERROR:
error->re_status = RPC_AUTHERROR;
return;
default:
/* something's wrong, but we don't know what ... */
error->re_status = RPC_FAILED;
error->re_lb.s1 = (long) MSG_DENIED;
error->re_lb.s2 = (long) rjct_stat;
return;
}
}
/*
* given a reply message, fills in the error
*/
void
_seterr_reply (struct rpc_msg *msg,
struct rpc_err *error)
{
/* optimized for normal, SUCCESSful case */
switch (msg->rm_reply.rp_stat)
{
case MSG_ACCEPTED:
if (msg->acpted_rply.ar_stat == SUCCESS)
{
error->re_status = RPC_SUCCESS;
return;
};
accepted (msg->acpted_rply.ar_stat, error);
break;
case MSG_DENIED:
rejected (msg->rjcted_rply.rj_stat, error);
break;
default:
error->re_status = RPC_FAILED;
error->re_lb.s1 = (long) (msg->rm_reply.rp_stat);
break;
}
switch (error->re_status)
{
case RPC_VERSMISMATCH:
error->re_vers.low = msg->rjcted_rply.rj_vers.low;
error->re_vers.high = msg->rjcted_rply.rj_vers.high;
break;
case RPC_AUTHERROR:
error->re_why = msg->rjcted_rply.rj_why;
break;
case RPC_PROGVERSMISMATCH:
error->re_vers.low = msg->acpted_rply.ar_vers.low;
error->re_vers.high = msg->acpted_rply.ar_vers.high;
break;
default:
break;
}
}
libc_hidden_nolink_sunrpc (_seterr_reply, GLIBC_2_0)
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