1 | /* |
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2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
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3 | * unrestricted use provided that this legend is included on all tape |
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4 | * media and as a part of the software program in whole or part. Users |
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5 | * may copy or modify Sun RPC without charge, but are not authorized |
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6 | * to license or distribute it to anyone else except as part of a product or |
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7 | * program developed by the user. |
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8 | * |
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9 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
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10 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
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11 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
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12 | * |
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13 | * Sun RPC is provided with no support and without any obligation on the |
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14 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
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15 | * modification or enhancement. |
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16 | * |
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17 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
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18 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
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19 | * OR ANY PART THEREOF. |
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20 | * |
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21 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
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22 | * or profits or other special, indirect and consequential damages, even if |
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23 | * Sun has been advised of the possibility of such damages. |
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24 | * |
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25 | * Sun Microsystems, Inc. |
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26 | * 2550 Garcia Avenue |
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27 | * Mountain View, California 94043 |
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28 | */ |
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29 | |
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30 | #if defined(LIBC_SCCS) && !defined(lint) |
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31 | /*static char *sccsid = "from: @(#)rpc_prot.c 1.36 87/08/11 Copyr 1984 Sun Micro";*/ |
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32 | /*static char *sccsid = "from: @(#)rpc_prot.c 2.3 88/08/07 4.0 RPCSRC";*/ |
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33 | static char *rcsid = "$FreeBSD: src/lib/libc/rpc/rpc_prot.c,v 1.8 1999/08/28 00:00:46 peter Exp $"; |
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34 | #endif |
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35 | |
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36 | /* |
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37 | * rpc_prot.c |
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38 | * |
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39 | * Copyright (C) 1984, Sun Microsystems, Inc. |
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40 | * |
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41 | * This set of routines implements the rpc message definition, |
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42 | * its serializer and some common rpc utility routines. |
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43 | * The routines are meant for various implementations of rpc - |
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44 | * they are NOT for the rpc client or rpc service implementations! |
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45 | * Because authentication stuff is easy and is part of rpc, the opaque |
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46 | * routines are also in this program. |
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47 | */ |
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48 | |
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49 | #include <sys/param.h> |
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50 | |
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51 | #include <rpc/rpc.h> |
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52 | |
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53 | /* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */ |
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54 | |
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55 | struct opaque_auth _null_auth; |
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56 | |
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57 | /* |
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58 | * XDR an opaque authentication struct |
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59 | * (see auth.h) |
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60 | */ |
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61 | bool_t |
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62 | xdr_opaque_auth(xdrs, ap) |
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63 | register XDR *xdrs; |
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64 | register struct opaque_auth *ap; |
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65 | { |
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66 | |
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67 | if (xdr_enum(xdrs, &(ap->oa_flavor))) |
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68 | return (xdr_bytes(xdrs, &ap->oa_base, |
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69 | &ap->oa_length, MAX_AUTH_BYTES)); |
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70 | return (FALSE); |
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71 | } |
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72 | |
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73 | /* |
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74 | * XDR a DES block |
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75 | */ |
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76 | bool_t |
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77 | xdr_des_block(xdrs, blkp) |
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78 | register XDR *xdrs; |
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79 | register des_block *blkp; |
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80 | { |
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81 | return (xdr_opaque(xdrs, (caddr_t)blkp, sizeof(des_block))); |
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82 | } |
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83 | |
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84 | /* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */ |
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85 | |
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86 | /* |
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87 | * XDR the MSG_ACCEPTED part of a reply message union |
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88 | */ |
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89 | bool_t |
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90 | xdr_accepted_reply(xdrs, ar) |
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91 | register XDR *xdrs; |
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92 | register struct accepted_reply *ar; |
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93 | { |
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94 | |
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95 | /* personalized union, rather than calling xdr_union */ |
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96 | if (! xdr_opaque_auth(xdrs, &(ar->ar_verf))) |
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97 | return (FALSE); |
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98 | if (! xdr_enum(xdrs, (enum_t *)&(ar->ar_stat))) |
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99 | return (FALSE); |
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100 | switch (ar->ar_stat) { |
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101 | |
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102 | case SUCCESS: |
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103 | return ((*(ar->ar_results.proc))(xdrs, ar->ar_results.where)); |
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104 | |
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105 | case PROG_MISMATCH: |
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106 | if (! xdr_u_int32_t(xdrs, &(ar->ar_vers.low))) |
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107 | return (FALSE); |
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108 | return (xdr_u_int32_t(xdrs, &(ar->ar_vers.high))); |
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109 | default: |
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110 | break; |
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111 | } |
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112 | return (TRUE); /* TRUE => open ended set of problems */ |
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113 | } |
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114 | |
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115 | /* |
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116 | * XDR the MSG_DENIED part of a reply message union |
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117 | */ |
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118 | bool_t |
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119 | xdr_rejected_reply(xdrs, rr) |
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120 | register XDR *xdrs; |
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121 | register struct rejected_reply *rr; |
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122 | { |
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123 | |
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124 | /* personalized union, rather than calling xdr_union */ |
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125 | if (! xdr_enum(xdrs, (enum_t *)&(rr->rj_stat))) |
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126 | return (FALSE); |
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127 | switch (rr->rj_stat) { |
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128 | |
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129 | case RPC_MISMATCH: |
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130 | if (! xdr_u_int32_t(xdrs, &(rr->rj_vers.low))) |
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131 | return (FALSE); |
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132 | return (xdr_u_int32_t(xdrs, &(rr->rj_vers.high))); |
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133 | |
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134 | case AUTH_ERROR: |
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135 | return (xdr_enum(xdrs, (enum_t *)&(rr->rj_why))); |
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136 | } |
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137 | return (FALSE); |
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138 | } |
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139 | |
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140 | static struct xdr_discrim reply_dscrm[3] = { |
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141 | { (int)MSG_ACCEPTED, xdr_accepted_reply }, |
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142 | { (int)MSG_DENIED, xdr_rejected_reply }, |
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143 | { __dontcare__, NULL_xdrproc_t } }; |
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144 | |
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145 | /* |
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146 | * XDR a reply message |
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147 | */ |
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148 | bool_t |
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149 | xdr_replymsg(xdrs, rmsg) |
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150 | register XDR *xdrs; |
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151 | register struct rpc_msg *rmsg; |
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152 | { |
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153 | if ( |
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154 | xdr_u_int32_t(xdrs, &(rmsg->rm_xid)) && |
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155 | xdr_enum(xdrs, (enum_t *)&(rmsg->rm_direction)) && |
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156 | (rmsg->rm_direction == REPLY) ) |
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157 | return (xdr_union(xdrs, (enum_t *)&(rmsg->rm_reply.rp_stat), |
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158 | (caddr_t)&(rmsg->rm_reply.ru), reply_dscrm, NULL_xdrproc_t)); |
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159 | return (FALSE); |
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160 | } |
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161 | |
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162 | |
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163 | /* |
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164 | * Serializes the "static part" of a call message header. |
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165 | * The fields include: rm_xid, rm_direction, rpcvers, prog, and vers. |
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166 | * The rm_xid is not really static, but the user can easily munge on the fly. |
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167 | */ |
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168 | bool_t |
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169 | xdr_callhdr(xdrs, cmsg) |
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170 | register XDR *xdrs; |
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171 | register struct rpc_msg *cmsg; |
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172 | { |
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173 | |
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174 | cmsg->rm_direction = CALL; |
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175 | cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION; |
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176 | if ( |
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177 | (xdrs->x_op == XDR_ENCODE) && |
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178 | xdr_u_int32_t(xdrs, &(cmsg->rm_xid)) && |
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179 | xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) && |
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180 | xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_rpcvers)) && |
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181 | xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_prog)) ) |
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182 | return (xdr_u_int32_t(xdrs, &(cmsg->rm_call.cb_vers))); |
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183 | return (FALSE); |
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184 | } |
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185 | |
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186 | /* ************************** Client utility routine ************* */ |
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187 | |
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188 | static void |
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189 | accepted(acpt_stat, error) |
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190 | register enum accept_stat acpt_stat; |
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191 | register struct rpc_err *error; |
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192 | { |
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193 | |
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194 | switch (acpt_stat) { |
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195 | |
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196 | case PROG_UNAVAIL: |
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197 | error->re_status = RPC_PROGUNAVAIL; |
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198 | return; |
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199 | |
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200 | case PROG_MISMATCH: |
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201 | error->re_status = RPC_PROGVERSMISMATCH; |
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202 | return; |
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203 | |
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204 | case PROC_UNAVAIL: |
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205 | error->re_status = RPC_PROCUNAVAIL; |
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206 | return; |
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207 | |
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208 | case GARBAGE_ARGS: |
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209 | error->re_status = RPC_CANTDECODEARGS; |
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210 | return; |
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211 | |
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212 | case SYSTEM_ERR: |
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213 | error->re_status = RPC_SYSTEMERROR; |
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214 | return; |
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215 | |
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216 | case SUCCESS: |
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217 | error->re_status = RPC_SUCCESS; |
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218 | return; |
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219 | } |
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220 | /* something's wrong, but we don't know what ... */ |
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221 | error->re_status = RPC_FAILED; |
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222 | error->re_lb.s1 = (long)MSG_ACCEPTED; |
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223 | error->re_lb.s2 = (long)acpt_stat; |
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224 | } |
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225 | |
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226 | static void |
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227 | rejected(rjct_stat, error) |
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228 | register enum reject_stat rjct_stat; |
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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 | switch (rjct_stat) { |
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233 | |
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234 | case RPC_VERSMISMATCH: |
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235 | error->re_status = RPC_VERSMISMATCH; |
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236 | return; |
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237 | |
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238 | case AUTH_ERROR: |
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239 | error->re_status = RPC_AUTHERROR; |
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240 | return; |
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241 | default: |
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242 | break; |
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243 | } |
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244 | /* something's wrong, but we don't know what ... */ |
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245 | error->re_status = RPC_FAILED; |
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246 | error->re_lb.s1 = (long)MSG_DENIED; |
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247 | error->re_lb.s2 = (long)rjct_stat; |
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248 | } |
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249 | |
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250 | /* |
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251 | * given a reply message, fills in the error |
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252 | */ |
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253 | void |
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254 | _seterr_reply(msg, error) |
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255 | register struct rpc_msg *msg; |
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256 | register struct rpc_err *error; |
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257 | { |
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258 | |
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259 | /* optimized for normal, SUCCESSful case */ |
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260 | switch (msg->rm_reply.rp_stat) { |
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261 | |
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262 | case MSG_ACCEPTED: |
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263 | if (msg->acpted_rply.ar_stat == SUCCESS) { |
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264 | error->re_status = RPC_SUCCESS; |
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265 | return; |
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266 | }; |
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267 | accepted(msg->acpted_rply.ar_stat, error); |
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268 | break; |
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269 | |
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270 | case MSG_DENIED: |
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271 | rejected(msg->rjcted_rply.rj_stat, error); |
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272 | break; |
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273 | |
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274 | default: |
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275 | error->re_status = RPC_FAILED; |
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276 | error->re_lb.s1 = (long)(msg->rm_reply.rp_stat); |
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277 | break; |
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278 | } |
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279 | switch (error->re_status) { |
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280 | |
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281 | case RPC_VERSMISMATCH: |
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282 | error->re_vers.low = msg->rjcted_rply.rj_vers.low; |
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283 | error->re_vers.high = msg->rjcted_rply.rj_vers.high; |
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284 | break; |
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285 | |
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286 | case RPC_AUTHERROR: |
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287 | error->re_why = msg->rjcted_rply.rj_why; |
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288 | break; |
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289 | |
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290 | case RPC_PROGVERSMISMATCH: |
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291 | error->re_vers.low = msg->acpted_rply.ar_vers.low; |
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292 | error->re_vers.high = msg->acpted_rply.ar_vers.high; |
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293 | break; |
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294 | default: |
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295 | break; |
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296 | } |
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297 | } |
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