[4721cf1] | 1 | /* @(#)rpc_prot.c 2.3 88/08/07 4.0 RPCSRC */ |
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| 2 | /* |
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| 3 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
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| 4 | * unrestricted use provided that this legend is included on all tape |
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| 5 | * media and as a part of the software program in whole or part. Users |
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| 6 | * may copy or modify Sun RPC without charge, but are not authorized |
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| 7 | * to license or distribute it to anyone else except as part of a product or |
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| 8 | * program developed by the user. |
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| 9 | * |
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| 10 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
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| 11 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
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| 12 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
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| 13 | * |
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| 14 | * Sun RPC is provided with no support and without any obligation on the |
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| 15 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
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| 16 | * modification or enhancement. |
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| 17 | */ |
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| 18 | |
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| 19 | /* |
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| 20 | * rpc_prot.c |
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| 21 | */ |
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| 22 | |
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| 23 | #include <rpc/rpc.h> |
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| 24 | |
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| 25 | /* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */ |
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| 26 | |
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| 27 | struct opaque_auth _null_auth; |
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| 28 | |
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| 29 | /* |
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| 30 | * XDR an opaque authentication struct |
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| 31 | * (see auth.h) |
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| 32 | */ |
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| 33 | bool_t |
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| 34 | xdr_opaque_auth(xdrs, ap) |
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| 35 | register XDR *xdrs; |
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| 36 | register struct opaque_auth *ap; |
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| 37 | { |
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| 38 | |
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| 39 | if (xdr_enum(xdrs, &(ap->oa_flavor))) |
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| 40 | return (xdr_bytes(xdrs, &ap->oa_base, |
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| 41 | &ap->oa_length, MAX_AUTH_BYTES)); |
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| 42 | return (FALSE); |
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| 43 | } |
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| 44 | |
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| 45 | /* |
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| 46 | * XDR a DES block |
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| 47 | */ |
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| 48 | bool_t |
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| 49 | xdr_des_block(xdrs, blkp) |
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| 50 | register XDR *xdrs; |
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| 51 | register des_block *blkp; |
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| 52 | { |
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| 53 | return (xdr_opaque(xdrs, (caddr_t)blkp, sizeof(des_block))); |
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| 54 | } |
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| 55 | |
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| 56 | /* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */ |
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| 57 | |
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| 58 | /* |
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| 59 | * XDR the MSG_ACCEPTED part of a reply message union |
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| 60 | */ |
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| 61 | bool_t |
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| 62 | xdr_accepted_reply(xdrs, ar) |
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| 63 | register XDR *xdrs; |
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| 64 | register struct accepted_reply *ar; |
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| 65 | { |
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| 66 | |
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| 67 | /* personalized union, rather than calling xdr_union */ |
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| 68 | if (! xdr_opaque_auth(xdrs, &(ar->ar_verf))) |
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| 69 | return (FALSE); |
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| 70 | if (! xdr_enum(xdrs, (enum_t *)&(ar->ar_stat))) |
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| 71 | return (FALSE); |
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| 72 | switch (ar->ar_stat) { |
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| 73 | |
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| 74 | case SUCCESS: |
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| 75 | return ((*(ar->ar_results.proc))(xdrs, ar->ar_results.where)); |
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| 76 | |
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| 77 | case PROG_MISMATCH: |
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| 78 | if (! xdr_u_long(xdrs, &(ar->ar_vers.low))) |
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| 79 | return (FALSE); |
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| 80 | return (xdr_u_long(xdrs, &(ar->ar_vers.high))); |
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| 81 | default: |
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| 82 | break; |
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| 83 | } |
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| 84 | return (TRUE); /* TRUE => open ended set of problems */ |
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| 85 | } |
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| 86 | |
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| 87 | /* |
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| 88 | * XDR the MSG_DENIED part of a reply message union |
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| 89 | */ |
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| 90 | bool_t |
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| 91 | xdr_rejected_reply(xdrs, rr) |
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| 92 | register XDR *xdrs; |
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| 93 | register struct rejected_reply *rr; |
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| 94 | { |
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| 95 | |
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| 96 | /* personalized union, rather than calling xdr_union */ |
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| 97 | if (! xdr_enum(xdrs, (enum_t *)&(rr->rj_stat))) |
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| 98 | return (FALSE); |
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| 99 | switch (rr->rj_stat) { |
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| 100 | |
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| 101 | case RPC_MISMATCH: |
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| 102 | if (! xdr_u_long(xdrs, &(rr->rj_vers.low))) |
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| 103 | return (FALSE); |
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| 104 | return (xdr_u_long(xdrs, &(rr->rj_vers.high))); |
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| 105 | |
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| 106 | case AUTH_ERROR: |
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| 107 | return (xdr_enum(xdrs, (enum_t *)&(rr->rj_why))); |
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| 108 | } |
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| 109 | return (FALSE); |
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| 110 | } |
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| 111 | |
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| 112 | static struct xdr_discrim reply_dscrm[3] = { |
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| 113 | { (int)MSG_ACCEPTED, xdr_accepted_reply }, |
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| 114 | { (int)MSG_DENIED, xdr_rejected_reply }, |
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| 115 | { __dontcare__, NULL_xdrproc_t } }; |
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| 116 | |
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| 117 | /* |
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| 118 | * XDR a reply message |
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| 119 | */ |
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| 120 | bool_t |
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| 121 | xdr_replymsg(xdrs, rmsg) |
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| 122 | register XDR *xdrs; |
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| 123 | register struct rpc_msg *rmsg; |
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| 124 | { |
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| 125 | if ( |
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| 126 | xdr_u_long(xdrs, &(rmsg->rm_xid)) && |
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| 127 | xdr_enum(xdrs, (enum_t *)&(rmsg->rm_direction)) && |
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| 128 | (rmsg->rm_direction == REPLY) ) |
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| 129 | return (xdr_union(xdrs, (enum_t *)&(rmsg->rm_reply.rp_stat), |
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| 130 | (caddr_t)&(rmsg->rm_reply.ru), reply_dscrm, NULL_xdrproc_t)); |
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| 131 | return (FALSE); |
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| 132 | } |
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| 133 | |
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| 134 | |
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| 135 | /* |
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| 136 | * Serializes the "static part" of a call message header. |
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| 137 | * The fields include: rm_xid, rm_direction, rpcvers, prog, and vers. |
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| 138 | * The rm_xid is not really static, but the user can easily munge on the fly. |
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| 139 | */ |
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| 140 | bool_t |
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| 141 | xdr_callhdr(xdrs, cmsg) |
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| 142 | register XDR *xdrs; |
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| 143 | register struct rpc_msg *cmsg; |
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| 144 | { |
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| 145 | |
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| 146 | cmsg->rm_direction = CALL; |
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| 147 | cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION; |
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| 148 | if ( |
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| 149 | (xdrs->x_op == XDR_ENCODE) && |
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| 150 | xdr_u_long(xdrs, &(cmsg->rm_xid)) && |
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| 151 | xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) && |
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| 152 | xdr_u_long(xdrs, &(cmsg->rm_call.cb_rpcvers)) && |
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| 153 | xdr_u_long(xdrs, &(cmsg->rm_call.cb_prog)) ) |
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| 154 | return (xdr_u_long(xdrs, &(cmsg->rm_call.cb_vers))); |
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| 155 | return (FALSE); |
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| 156 | } |
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| 157 | |
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| 158 | /* ************************** Client utility routine ************* */ |
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| 159 | |
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| 160 | static void |
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| 161 | accepted(acpt_stat, error) |
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| 162 | register enum accept_stat acpt_stat; |
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| 163 | register struct rpc_err *error; |
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| 164 | { |
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| 165 | |
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| 166 | switch (acpt_stat) { |
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| 167 | |
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| 168 | case PROG_UNAVAIL: |
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| 169 | error->re_status = RPC_PROGUNAVAIL; |
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| 170 | return; |
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| 171 | |
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| 172 | case PROG_MISMATCH: |
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| 173 | error->re_status = RPC_PROGVERSMISMATCH; |
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| 174 | return; |
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| 175 | |
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| 176 | case PROC_UNAVAIL: |
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| 177 | error->re_status = RPC_PROCUNAVAIL; |
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| 178 | return; |
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| 179 | |
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| 180 | case GARBAGE_ARGS: |
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| 181 | error->re_status = RPC_CANTDECODEARGS; |
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| 182 | return; |
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| 183 | |
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| 184 | case SYSTEM_ERR: |
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| 185 | error->re_status = RPC_SYSTEMERROR; |
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| 186 | return; |
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| 187 | |
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| 188 | case SUCCESS: |
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| 189 | error->re_status = RPC_SUCCESS; |
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| 190 | return; |
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| 191 | } |
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| 192 | /* something's wrong, but we don't know what ... */ |
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| 193 | error->re_status = RPC_FAILED; |
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| 194 | error->re_lb.s1 = (long)MSG_ACCEPTED; |
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| 195 | error->re_lb.s2 = (long)acpt_stat; |
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| 196 | } |
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| 197 | |
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| 198 | static void |
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| 199 | rejected(rjct_stat, error) |
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| 200 | register enum reject_stat rjct_stat; |
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| 201 | register struct rpc_err *error; |
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| 202 | { |
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| 203 | |
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| 204 | switch (rjct_stat) { |
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| 205 | |
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| 206 | case RPC_VERSMISMATCH: |
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| 207 | error->re_status = RPC_VERSMISMATCH; |
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| 208 | return; |
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| 209 | |
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| 210 | case AUTH_ERROR: |
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| 211 | error->re_status = RPC_AUTHERROR; |
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| 212 | return; |
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| 213 | |
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| 214 | default: |
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| 215 | break; |
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| 216 | } |
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| 217 | /* something's wrong, but we don't know what ... */ |
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| 218 | error->re_status = RPC_FAILED; |
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| 219 | error->re_lb.s1 = (long)MSG_DENIED; |
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| 220 | error->re_lb.s2 = (long)rjct_stat; |
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| 221 | } |
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| 222 | |
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| 223 | /* |
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| 224 | * given a reply message, fills in the error |
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| 225 | */ |
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| 226 | void |
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| 227 | _seterr_reply(msg, error) |
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| 228 | register struct rpc_msg *msg; |
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| 229 | register struct rpc_err *error; |
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| 230 | { |
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| 231 | |
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| 232 | /* optimized for normal, SUCCESSful case */ |
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| 233 | switch (msg->rm_reply.rp_stat) { |
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| 234 | |
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| 235 | case MSG_ACCEPTED: |
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| 236 | if (msg->acpted_rply.ar_stat == SUCCESS) { |
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| 237 | error->re_status = RPC_SUCCESS; |
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| 238 | return; |
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| 239 | }; |
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| 240 | accepted(msg->acpted_rply.ar_stat, error); |
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| 241 | break; |
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| 242 | |
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| 243 | case MSG_DENIED: |
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| 244 | rejected(msg->rjcted_rply.rj_stat, error); |
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| 245 | break; |
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| 246 | |
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| 247 | default: |
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| 248 | error->re_status = RPC_FAILED; |
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| 249 | error->re_lb.s1 = (long)(msg->rm_reply.rp_stat); |
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| 250 | break; |
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| 251 | } |
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| 252 | switch (error->re_status) { |
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| 253 | |
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| 254 | case RPC_VERSMISMATCH: |
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| 255 | error->re_vers.low = msg->rjcted_rply.rj_vers.low; |
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| 256 | error->re_vers.high = msg->rjcted_rply.rj_vers.high; |
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| 257 | break; |
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| 258 | |
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| 259 | case RPC_AUTHERROR: |
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| 260 | error->re_why = msg->rjcted_rply.rj_why; |
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| 261 | break; |
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| 262 | |
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| 263 | case RPC_PROGVERSMISMATCH: |
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| 264 | error->re_vers.low = msg->acpted_rply.ar_vers.low; |
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| 265 | error->re_vers.high = msg->acpted_rply.ar_vers.high; |
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| 266 | break; |
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| 267 | |
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| 268 | default: |
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| 269 | break; |
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| 270 | } |
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| 271 | } |
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