/* $NetBSD: rpc_prot.c,v 1.16 2000/06/02 23:11:13 fvdl Exp $ */ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 2009, Sun Microsystems, Inc. * All rights reserved. * * 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 Sun Microsystems, 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. */ #if defined(LIBC_SCCS) && !defined(lint) static char *sccsid2 = "@(#)rpc_prot.c 1.36 87/08/11 Copyr 1984 Sun Micro"; static char *sccsid = "@(#)rpc_prot.c 2.3 88/08/07 4.0 RPCSRC"; #endif #include /* * rpc_prot.c * * Copyright (C) 1984, Sun Microsystems, Inc. * * 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 "namespace.h" #include #include #include #include "un-namespace.h" static void accepted(enum accept_stat, struct rpc_err *); static void rejected(enum reject_stat, struct rpc_err *); /* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */ extern struct opaque_auth _null_auth; /* * XDR an opaque authentication struct * (see auth.h) */ bool_t xdr_opaque_auth(XDR *xdrs, struct opaque_auth *ap) { assert(xdrs != NULL); assert(ap != NULL); if (xdr_enum(xdrs, &(ap->oa_flavor))) return (xdr_bytes(xdrs, &ap->oa_base, &ap->oa_length, MAX_AUTH_BYTES)); return (FALSE); } /* * XDR a DES block */ bool_t xdr_des_block(XDR *xdrs, des_block *blkp) { assert(xdrs != NULL); assert(blkp != NULL); return (xdr_opaque(xdrs, (caddr_t)(void *)blkp, sizeof(des_block))); } /* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */ /* * XDR the MSG_ACCEPTED part of a reply message union */ bool_t xdr_accepted_reply(XDR *xdrs, struct accepted_reply *ar) { enum accept_stat *par_stat; assert(xdrs != NULL); assert(ar != NULL); par_stat = &ar->ar_stat; /* personalized union, rather than calling xdr_union */ if (! xdr_opaque_auth(xdrs, &(ar->ar_verf))) return (FALSE); if (! xdr_enum(xdrs, (enum_t *) par_stat)) return (FALSE); switch (ar->ar_stat) { case SUCCESS: return ((*(ar->ar_results.proc))(xdrs, ar->ar_results.where)); case PROG_MISMATCH: if (!xdr_rpcvers(xdrs, &(ar->ar_vers.low))) return (FALSE); return (xdr_rpcvers(xdrs, &(ar->ar_vers.high))); case GARBAGE_ARGS: case SYSTEM_ERR: case PROC_UNAVAIL: case PROG_UNAVAIL: break; } return (TRUE); /* TRUE => open ended set of problems */ } /* * XDR the MSG_DENIED part of a reply message union */ bool_t xdr_rejected_reply(XDR *xdrs, struct rejected_reply *rr) { enum reject_stat *prj_stat; enum auth_stat *prj_why; assert(xdrs != NULL); assert(rr != NULL); prj_stat = &rr->rj_stat; /* personalized union, rather than calling xdr_union */ if (! xdr_enum(xdrs, (enum_t *) prj_stat)) return (FALSE); switch (rr->rj_stat) { case RPC_MISMATCH: if (! xdr_rpcvers(xdrs, &(rr->rj_vers.low))) return (FALSE); return (xdr_rpcvers(xdrs, &(rr->rj_vers.high))); case AUTH_ERROR: prj_why = &rr->rj_why; return (xdr_enum(xdrs, (enum_t *) prj_why)); } /* NOTREACHED */ assert(0); return (FALSE); } 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) { enum msg_type *prm_direction; enum reply_stat *prp_stat; assert(xdrs != NULL); assert(rmsg != NULL); prm_direction = &rmsg->rm_direction; prp_stat = &rmsg->rm_reply.rp_stat; if ( xdr_u_int32_t(xdrs, &(rmsg->rm_xid)) && xdr_enum(xdrs, (enum_t *) prm_direction) && (rmsg->rm_direction == REPLY) ) return (xdr_union(xdrs, (enum_t *) prp_stat, (caddr_t)(void *)&(rmsg->rm_reply.ru), reply_dscrm, NULL_xdrproc_t)); return (FALSE); } /* * 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) { enum msg_type *prm_direction; assert(xdrs != NULL); assert(cmsg != NULL); prm_direction = &cmsg->rm_direction; cmsg->rm_direction = CALL; cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION; if ( (xdrs->x_op == XDR_ENCODE) && xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) && xdr_enum(xdrs, (enum_t *) prm_direction) && xdr_rpcvers(xdrs, &(cmsg->rm_call.cb_rpcvers)) && xdr_rpcprog(xdrs, &(cmsg->rm_call.cb_prog)) ) return (xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_vers))); return (FALSE); } /* ************************** Client utility routine ************* */ static void accepted(enum accept_stat acpt_stat, struct rpc_err *error) { assert(error != NULL); 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; } /* NOTREACHED */ /* something's wrong, but we don't know what ... */ error->re_status = RPC_FAILED; error->re_lb.s1 = (int32_t)MSG_ACCEPTED; error->re_lb.s2 = (int32_t)acpt_stat; } static void rejected(enum reject_stat rjct_stat, struct rpc_err *error) { assert(error != NULL); switch (rjct_stat) { case RPC_MISMATCH: error->re_status = RPC_VERSMISMATCH; return; case AUTH_ERROR: error->re_status = RPC_AUTHERROR; return; } /* something's wrong, but we don't know what ... */ /* NOTREACHED */ error->re_status = RPC_FAILED; error->re_lb.s1 = (int32_t)MSG_DENIED; error->re_lb.s2 = (int32_t)rjct_stat; } /* * given a reply message, fills in the error */ void _seterr_reply(struct rpc_msg *msg, struct rpc_err *error) { assert(msg != NULL); assert(error != NULL); /* 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 = (int32_t)(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; case RPC_FAILED: case RPC_SUCCESS: case RPC_PROGNOTREGISTERED: case RPC_PMAPFAILURE: case RPC_UNKNOWNPROTO: case RPC_UNKNOWNHOST: case RPC_SYSTEMERROR: case RPC_CANTDECODEARGS: case RPC_PROCUNAVAIL: case RPC_PROGUNAVAIL: case RPC_TIMEDOUT: case RPC_CANTRECV: case RPC_CANTSEND: case RPC_CANTDECODERES: case RPC_CANTENCODEARGS: default: break; } }