277 lines
7.7 KiB
C
277 lines
7.7 KiB
C
/*
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* rpc_prot.c
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*
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* Copyright (c) 2010, Oracle America, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* * Neither the name of the "Oracle America, Inc." nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This set of routines implements the rpc message definition,
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* its serializer and some common rpc utility routines.
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* The routines are meant for various implementations of rpc -
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* they are NOT for the rpc client or rpc service implementations!
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* Because authentication stuff is easy and is part of rpc, the opaque
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* routines are also in this program.
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*/
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#include <sys/param.h>
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#include <rpc/rpc.h>
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#include <shlib-compat.h>
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/* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */
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/*
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* XDR an opaque authentication struct
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* (see auth.h)
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*/
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bool_t
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xdr_opaque_auth (XDR *xdrs, struct opaque_auth *ap)
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{
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if (xdr_enum (xdrs, &(ap->oa_flavor)))
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return xdr_bytes (xdrs, &ap->oa_base,
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&ap->oa_length, MAX_AUTH_BYTES);
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return FALSE;
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}
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libc_hidden_nolink_sunrpc (xdr_opaque_auth, GLIBC_2_0)
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/*
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* XDR a DES block
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*/
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bool_t
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xdr_des_block (XDR *xdrs, des_block *blkp)
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{
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return xdr_opaque (xdrs, (caddr_t) blkp, sizeof (des_block));
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}
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libc_hidden_nolink_sunrpc (xdr_des_block, GLIBC_2_0)
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/* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */
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/*
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* XDR the MSG_ACCEPTED part of a reply message union
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*/
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bool_t
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xdr_accepted_reply (XDR *xdrs, struct accepted_reply *ar)
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{
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/* personalized union, rather than calling xdr_union */
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if (!xdr_opaque_auth (xdrs, &(ar->ar_verf)))
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return FALSE;
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if (!xdr_enum (xdrs, (enum_t *) & (ar->ar_stat)))
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return FALSE;
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switch (ar->ar_stat)
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{
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case SUCCESS:
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return ((*(ar->ar_results.proc)) (xdrs, ar->ar_results.where));
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case PROG_MISMATCH:
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if (!xdr_u_long (xdrs, &(ar->ar_vers.low)))
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return FALSE;
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return (xdr_u_long (xdrs, &(ar->ar_vers.high)));
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default:
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return TRUE;
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}
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return TRUE; /* TRUE => open ended set of problems */
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}
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libc_hidden_nolink_sunrpc (xdr_accepted_reply, GLIBC_2_0)
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/*
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* XDR the MSG_DENIED part of a reply message union
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*/
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bool_t
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xdr_rejected_reply (XDR *xdrs, struct rejected_reply *rr)
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{
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/* personalized union, rather than calling xdr_union */
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if (!xdr_enum (xdrs, (enum_t *) & (rr->rj_stat)))
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return FALSE;
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switch (rr->rj_stat)
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{
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case RPC_MISMATCH:
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if (!xdr_u_long (xdrs, &(rr->rj_vers.low)))
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return FALSE;
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return xdr_u_long (xdrs, &(rr->rj_vers.high));
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case AUTH_ERROR:
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return xdr_enum (xdrs, (enum_t *) & (rr->rj_why));
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}
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return FALSE;
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}
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libc_hidden_nolink_sunrpc (xdr_rejected_reply, GLIBC_2_0)
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static const struct xdr_discrim reply_dscrm[3] =
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{
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{(int) MSG_ACCEPTED, (xdrproc_t) xdr_accepted_reply},
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{(int) MSG_DENIED, (xdrproc_t) xdr_rejected_reply},
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{__dontcare__, NULL_xdrproc_t}};
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/*
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* XDR a reply message
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*/
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bool_t
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xdr_replymsg (XDR *xdrs, struct rpc_msg *rmsg)
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{
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if (xdr_u_long (xdrs, &(rmsg->rm_xid)) &&
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xdr_enum (xdrs, (enum_t *) & (rmsg->rm_direction)) &&
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(rmsg->rm_direction == REPLY))
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return xdr_union (xdrs, (enum_t *) & (rmsg->rm_reply.rp_stat),
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(caddr_t) & (rmsg->rm_reply.ru), reply_dscrm,
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NULL_xdrproc_t);
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return FALSE;
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}
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libc_hidden_nolink_sunrpc (xdr_replymsg, GLIBC_2_0)
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/*
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* Serializes the "static part" of a call message header.
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* The fields include: rm_xid, rm_direction, rpcvers, prog, and vers.
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* The rm_xid is not really static, but the user can easily munge on the fly.
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*/
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bool_t
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xdr_callhdr (XDR *xdrs, struct rpc_msg *cmsg)
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{
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cmsg->rm_direction = CALL;
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cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION;
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if (
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(xdrs->x_op == XDR_ENCODE) &&
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xdr_u_long (xdrs, &(cmsg->rm_xid)) &&
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xdr_enum (xdrs, (enum_t *) & (cmsg->rm_direction)) &&
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xdr_u_long (xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
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xdr_u_long (xdrs, &(cmsg->rm_call.cb_prog)))
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return xdr_u_long (xdrs, &(cmsg->rm_call.cb_vers));
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return FALSE;
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}
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libc_hidden_nolink_sunrpc (xdr_callhdr, GLIBC_2_0)
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/* ************************** Client utility routine ************* */
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static void
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accepted (enum accept_stat acpt_stat,
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struct rpc_err *error)
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{
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switch (acpt_stat)
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{
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case PROG_UNAVAIL:
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error->re_status = RPC_PROGUNAVAIL;
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return;
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case PROG_MISMATCH:
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error->re_status = RPC_PROGVERSMISMATCH;
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return;
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case PROC_UNAVAIL:
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error->re_status = RPC_PROCUNAVAIL;
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return;
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case GARBAGE_ARGS:
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error->re_status = RPC_CANTDECODEARGS;
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return;
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case SYSTEM_ERR:
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error->re_status = RPC_SYSTEMERROR;
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return;
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case SUCCESS:
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error->re_status = RPC_SUCCESS;
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return;
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}
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/* something's wrong, but we don't know what ... */
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error->re_status = RPC_FAILED;
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error->re_lb.s1 = (long) MSG_ACCEPTED;
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error->re_lb.s2 = (long) acpt_stat;
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}
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static void
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rejected (enum reject_stat rjct_stat,
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struct rpc_err *error)
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{
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switch (rjct_stat)
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{
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case RPC_MISMATCH:
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error->re_status = RPC_VERSMISMATCH;
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return;
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case AUTH_ERROR:
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error->re_status = RPC_AUTHERROR;
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return;
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default:
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/* something's wrong, but we don't know what ... */
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error->re_status = RPC_FAILED;
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error->re_lb.s1 = (long) MSG_DENIED;
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error->re_lb.s2 = (long) rjct_stat;
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return;
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}
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}
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/*
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* given a reply message, fills in the error
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*/
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void
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_seterr_reply (struct rpc_msg *msg,
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struct rpc_err *error)
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{
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/* optimized for normal, SUCCESSful case */
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switch (msg->rm_reply.rp_stat)
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{
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case MSG_ACCEPTED:
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if (msg->acpted_rply.ar_stat == SUCCESS)
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{
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error->re_status = RPC_SUCCESS;
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return;
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};
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accepted (msg->acpted_rply.ar_stat, error);
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break;
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case MSG_DENIED:
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rejected (msg->rjcted_rply.rj_stat, error);
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break;
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default:
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error->re_status = RPC_FAILED;
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error->re_lb.s1 = (long) (msg->rm_reply.rp_stat);
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break;
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}
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switch (error->re_status)
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{
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case RPC_VERSMISMATCH:
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error->re_vers.low = msg->rjcted_rply.rj_vers.low;
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error->re_vers.high = msg->rjcted_rply.rj_vers.high;
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break;
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case RPC_AUTHERROR:
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error->re_why = msg->rjcted_rply.rj_why;
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break;
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case RPC_PROGVERSMISMATCH:
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error->re_vers.low = msg->acpted_rply.ar_vers.low;
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error->re_vers.high = msg->acpted_rply.ar_vers.high;
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break;
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default:
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break;
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}
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}
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libc_hidden_nolink_sunrpc (_seterr_reply, GLIBC_2_0)
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