| /* |
| * 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. |
| */ |
| |
| /* |
| * 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 <config.h> |
| #include <sys/param.h> |
| |
| #include <assert.h> |
| |
| #include <rpc/rpc.h> |
| #include <rpc/xdr_inline.h> |
| #include <rpc/auth_inline.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 |
| xdr_opaque_auth(XDR *xdrs, struct opaque_auth *ap) |
| { |
| assert(xdrs != NULL); |
| assert(ap != NULL); |
| |
| if (inline_xdr_enum(xdrs, &(ap->oa_flavor))) |
| return (inline_xdr_bytes |
| (xdrs, &ap->oa_base, &ap->oa_length, MAX_AUTH_BYTES)); |
| return (false); |
| } |
| |
| /* |
| * XDR a DES block |
| */ |
| bool |
| xdr_des_block(XDR *xdrs, des_block *blkp) |
| { |
| assert(xdrs != NULL); |
| assert(blkp != NULL); |
| |
| return (inline_xdr_opaque |
| (xdrs, (caddr_t) (void *)blkp, sizeof(des_block))); |
| } |
| |
| /* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */ |
| |
| /* |
| * XDR the MSG_ACCEPTED part of a reply message union |
| */ |
| bool |
| xdr_naccepted_reply(XDR *xdrs, struct accepted_reply *ar) |
| { |
| assert(xdrs != NULL); |
| assert(ar != NULL); |
| |
| /* personalized union, rather than calling xdr_union */ |
| if (!inline_xdr_opaque_auth(xdrs, &(ar->ar_verf))) |
| return (false); |
| if (!inline_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 (!inline_xdr_u_int32_t(xdrs, &(ar->ar_vers.low))) |
| return (false); |
| return (inline_xdr_u_int32_t(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 |
| xdr_nrejected_reply(XDR *xdrs, struct rejected_reply *rr) |
| { |
| assert(xdrs != NULL); |
| assert(rr != NULL); |
| |
| /* personalized union, rather than calling xdr_union */ |
| if (!inline_xdr_enum(xdrs, (enum_t *) &(rr->rj_stat))) |
| return (false); |
| switch (rr->rj_stat) { |
| |
| case RPC_MISMATCH: |
| if (!inline_xdr_u_int32_t(xdrs, &(rr->rj_vers.low))) |
| return (false); |
| return (inline_xdr_u_int32_t(xdrs, &(rr->rj_vers.high))); |
| |
| case AUTH_ERROR: |
| return (inline_xdr_enum(xdrs, (enum_t *) &(rr->rj_why))); |
| } |
| /* NOTREACHED */ |
| assert(0); |
| return (false); |
| } |
| |
| static const struct xdr_discrim reply_dscrm[3] = { |
| {(int)MSG_ACCEPTED, (xdrproc_t) xdr_naccepted_reply}, |
| {(int)MSG_DENIED, (xdrproc_t) xdr_nrejected_reply}, |
| {__dontcare__, NULL_xdrproc_t} |
| }; |
| |
| /* |
| * XDR a reply message |
| */ |
| bool |
| xdr_nreplymsg(XDR *xdrs, struct rpc_msg *rmsg) |
| { |
| assert(xdrs != NULL); |
| assert(rmsg != NULL); |
| |
| if (inline_xdr_u_int32_t(xdrs, &(rmsg->rm_xid)) |
| && inline_xdr_enum(xdrs, (enum_t *) &(rmsg->rm_direction)) |
| && (rmsg->rm_direction == REPLY)) |
| return (inline_xdr_union |
| (xdrs, (enum_t *) &(rmsg->rm_reply.rp_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 |
| xdr_ncallhdr(XDR *xdrs, struct rpc_msg *cmsg) |
| { |
| assert(xdrs != NULL); |
| assert(cmsg != NULL); |
| |
| cmsg->rm_direction = CALL; |
| cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION; |
| if ((xdrs->x_op == XDR_ENCODE) |
| && inline_xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) |
| && inline_xdr_enum(xdrs, (enum_t *) &(cmsg->rm_direction)) |
| && inline_xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) |
| && inline_xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_prog))) |
| return (inline_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; |
| } |
| } |