diff options
Diffstat (limited to '')
| -rw-r--r-- | src/rpc_prot.c | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/src/rpc_prot.c b/src/rpc_prot.c new file mode 100644 index 0000000..5841e51 --- /dev/null +++ b/src/rpc_prot.c @@ -0,0 +1,342 @@ +/* + * 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 <sys/param.h> + +#include <assert.h> + +#include <rpc/rpc.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(xdrs, ap) + 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(xdrs, blkp) + 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(xdrs, ar) + XDR *xdrs; + struct accepted_reply *ar; +{ + + assert(xdrs != NULL); + assert(ar != NULL); + + /* 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))); + + 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(xdrs, rr) + XDR *xdrs; + struct rejected_reply *rr; +{ + + assert(xdrs != NULL); + assert(rr != NULL); + + /* 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))); + } + /* NOTREACHED */ + 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(xdrs, rmsg) + XDR *xdrs; + struct rpc_msg *rmsg; +{ + assert(xdrs != NULL); + assert(rmsg != NULL); + + 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)(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(xdrs, cmsg) + 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) && + 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; +{ + + 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(rjct_stat, error) + 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(msg, error) + 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; + } +} |