/* * Sun RPC is a product of Sun Microsystems, Inc. and is provided for * unrestricted use provided that this legend is included on all tape * media and as a part of the software program in whole or part. Users * may copy or modify Sun RPC without charge, but are not authorized * to license or distribute it to anyone else except as part of a product or * program developed by the user. * * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun RPC is provided with no support and without any obligation on the * part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California 94043 */ #if defined(LIBC_SCCS) && !defined(lint) static char *rcsid = "$OpenBSD: rpc_prot.c,v 1.7 2001/09/15 13:51:01 deraadt Exp $"; #endif /* LIBC_SCCS and not lint */ /* * 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 #include /* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */ struct opaque_auth _null_auth; /* * XDR an opaque authentication struct * (see auth.h) */ bool_t xdr_opaque_auth(xdrs, ap) 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); } /* * XDR a DES block */ bool_t xdr_des_block(xdrs, blkp) XDR *xdrs; des_block *blkp; { return (xdr_opaque(xdrs, (caddr_t)blkp, sizeof(des_block))); } /* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */ /* * XDR the MSG_ACCEPTED part of a reply message union */ bool_t xdr_accepted_reply(xdrs, ar) 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_int32_t(xdrs, &(ar->ar_vers.low))) return (FALSE); return (xdr_u_int32_t(xdrs, &(ar->ar_vers.high))); default: return (TRUE); /* TRUE => open ended set of problems */ } } /* * XDR the MSG_DENIED part of a reply message union */ bool_t xdr_rejected_reply(xdrs, rr) 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_int32_t(xdrs, &(rr->rj_vers.low))) return (FALSE); return (xdr_u_int32_t(xdrs, &(rr->rj_vers.high))); case AUTH_ERROR: return (xdr_enum(xdrs, (enum_t *)&(rr->rj_why))); } return (FALSE); } static struct xdr_discrim reply_dscrm[3] = { { (int)MSG_ACCEPTED, xdr_accepted_reply }, { (int)MSG_DENIED, xdr_rejected_reply }, { __dontcare__, NULL_xdrproc_t } }; /* * XDR a reply message */ bool_t xdr_replymsg(xdrs, rmsg) XDR *xdrs; struct rpc_msg *rmsg; { if (xdr_u_int32_t(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); } /* * 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(xdrs, cmsg) 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_int32_t(xdrs, &(cmsg->rm_xid)) && xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) && xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) && xdr_u_int32_t(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(acpt_stat, error) 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(rjct_stat, error) 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; } /* 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; } /* * given a reply message, fills in the error */ void _seterr_reply(msg, error) 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; } }