rpc_prot.c 7.2 KB

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