1 /* $NetBSD: rpcb_prot.c,v 1.5 2003/09/09 03:56:40 itojun Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 /* 32 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 33 */ 34 35 /* #ident "@(#)rpcb_prot.c 1.13 94/04/24 SMI" */ 36 37 #include <sys/cdefs.h> 38 #if defined(LIBC_SCCS) && !defined(lint) 39 #if 0 40 static char sccsid[] = "@(#)rpcb_prot.c 1.9 89/04/21 Copyr 1984 Sun Micro"; 41 #else 42 __RCSID("$NetBSD: rpcb_prot.c,v 1.5 2003/09/09 03:56:40 itojun Exp $"); 43 #endif 44 #endif 45 46 /* 47 * rpcb_prot.c 48 * XDR routines for the rpcbinder version 3. 49 * 50 * Copyright (C) 1984, 1988, Sun Microsystems, Inc. 51 */ 52 53 #include "namespace.h" 54 55 #include <rpc/rpc.h> 56 #include <rpc/types.h> 57 #include <rpc/xdr.h> 58 #include <rpc/rpcb_prot.h> 59 60 #include <assert.h> 61 62 #ifdef __weak_alias 63 __weak_alias(xdr_rpcb,_xdr_rpcb) 64 __weak_alias(xdr_rpcblist_ptr,_xdr_rpcblist_ptr) 65 __weak_alias(xdr_rpcblist,_xdr_rpcblist) 66 __weak_alias(xdr_rpcb_entry,_xdr_rpcb_entry) 67 __weak_alias(xdr_rpcb_entry_list_ptr,_xdr_rpcb_entry_list_ptr) 68 __weak_alias(xdr_rpcb_rmtcallargs,_xdr_rpcb_rmtcallargs) 69 __weak_alias(xdr_rpcb_rmtcallres,_xdr_rpcb_rmtcallres) 70 __weak_alias(xdr_netbuf,_xdr_netbuf) 71 #endif 72 73 74 bool_t 75 xdr_rpcb(xdrs, objp) 76 XDR *xdrs; 77 RPCB *objp; 78 { 79 80 _DIAGASSERT(objp != NULL); 81 82 if (!xdr_u_int32_t(xdrs, &objp->r_prog)) { 83 return (FALSE); 84 } 85 if (!xdr_u_int32_t(xdrs, &objp->r_vers)) { 86 return (FALSE); 87 } 88 if (!xdr_string(xdrs, &objp->r_netid, (u_int)~0)) { 89 return (FALSE); 90 } 91 if (!xdr_string(xdrs, &objp->r_addr, (u_int)~0)) { 92 return (FALSE); 93 } 94 if (!xdr_string(xdrs, &objp->r_owner, (u_int)~0)) { 95 return (FALSE); 96 } 97 return (TRUE); 98 } 99 100 /* 101 * rpcblist_ptr implements a linked list. The RPCL definition from 102 * rpcb_prot.x is: 103 * 104 * struct rpcblist { 105 * rpcb rpcb_map; 106 * struct rpcblist *rpcb_next; 107 * }; 108 * typedef rpcblist *rpcblist_ptr; 109 * 110 * Recall that "pointers" in XDR are encoded as a boolean, indicating whether 111 * there's any data behind the pointer, followed by the data (if any exists). 112 * The boolean can be interpreted as ``more data follows me''; if FALSE then 113 * nothing follows the boolean; if TRUE then the boolean is followed by an 114 * actual struct rpcb, and another rpcblist_ptr (declared in RPCL as "struct 115 * rpcblist *"). 116 * 117 * This could be implemented via the xdr_pointer type, though this would 118 * result in one recursive call per element in the list. Rather than do that 119 * we can ``unwind'' the recursion into a while loop and use xdr_reference to 120 * serialize the rpcb elements. 121 */ 122 123 bool_t 124 xdr_rpcblist_ptr(xdrs, rp) 125 XDR *xdrs; 126 rpcblist_ptr *rp; 127 { 128 /* 129 * more_elements is pre-computed in case the direction is 130 * XDR_ENCODE or XDR_FREE. more_elements is overwritten by 131 * xdr_bool when the direction is XDR_DECODE. 132 */ 133 bool_t more_elements; 134 int freeing; 135 rpcblist_ptr next; 136 rpcblist_ptr next_copy; 137 138 _DIAGASSERT(xdrs != NULL); 139 /* XXX: rp may be NULL ??? */ 140 141 freeing = (xdrs->x_op == XDR_FREE); 142 143 for (;;) { 144 more_elements = (bool_t)(*rp != NULL); 145 if (! xdr_bool(xdrs, &more_elements)) { 146 return (FALSE); 147 } 148 if (! more_elements) { 149 return (TRUE); /* we are done */ 150 } 151 /* 152 * the unfortunate side effect of non-recursion is that in 153 * the case of freeing we must remember the next object 154 * before we free the current object ... 155 */ 156 if (freeing) 157 next = (*rp)->rpcb_next; 158 if (! xdr_reference(xdrs, (caddr_t *)rp, 159 (u_int)sizeof (rpcblist), (xdrproc_t)xdr_rpcb)) { 160 return (FALSE); 161 } 162 if (freeing) { 163 next_copy = next; 164 rp = &next_copy; 165 /* 166 * Note that in the subsequent iteration, next_copy 167 * gets nulled out by the xdr_reference 168 * but next itself survives. 169 */ 170 } else { 171 rp = &((*rp)->rpcb_next); 172 } 173 } 174 /*NOTREACHED*/ 175 } 176 177 /* 178 * xdr_rpcblist() is specified to take a RPCBLIST **, but is identical in 179 * functionality to xdr_rpcblist_ptr(). 180 */ 181 bool_t 182 xdr_rpcblist(xdrs, rp) 183 XDR *xdrs; 184 RPCBLIST **rp; 185 { 186 bool_t dummy; 187 188 dummy = xdr_rpcblist_ptr(xdrs, (rpcblist_ptr *)rp); 189 return (dummy); 190 } 191 192 193 bool_t 194 xdr_rpcb_entry(xdrs, objp) 195 XDR *xdrs; 196 rpcb_entry *objp; 197 { 198 199 _DIAGASSERT(objp != NULL); 200 201 if (!xdr_string(xdrs, &objp->r_maddr, (u_int)~0)) { 202 return (FALSE); 203 } 204 if (!xdr_string(xdrs, &objp->r_nc_netid, (u_int)~0)) { 205 return (FALSE); 206 } 207 if (!xdr_u_int32_t(xdrs, &objp->r_nc_semantics)) { 208 return (FALSE); 209 } 210 if (!xdr_string(xdrs, &objp->r_nc_protofmly, (u_int)~0)) { 211 return (FALSE); 212 } 213 if (!xdr_string(xdrs, &objp->r_nc_proto, (u_int)~0)) { 214 return (FALSE); 215 } 216 return (TRUE); 217 } 218 219 bool_t 220 xdr_rpcb_entry_list_ptr(xdrs, rp) 221 XDR *xdrs; 222 rpcb_entry_list_ptr *rp; 223 { 224 /* 225 * more_elements is pre-computed in case the direction is 226 * XDR_ENCODE or XDR_FREE. more_elements is overwritten by 227 * xdr_bool when the direction is XDR_DECODE. 228 */ 229 bool_t more_elements; 230 int freeing; 231 rpcb_entry_list_ptr next; 232 rpcb_entry_list_ptr next_copy; 233 234 _DIAGASSERT(xdrs != NULL); 235 /* XXX: rp is allowed to be NULL ??? */ 236 237 freeing = (xdrs->x_op == XDR_FREE); 238 239 for (;;) { 240 more_elements = (bool_t)(*rp != NULL); 241 if (! xdr_bool(xdrs, &more_elements)) { 242 return (FALSE); 243 } 244 if (! more_elements) { 245 return (TRUE); /* we are done */ 246 } 247 /* 248 * the unfortunate side effect of non-recursion is that in 249 * the case of freeing we must remember the next object 250 * before we free the current object ... 251 */ 252 if (freeing) 253 next = (*rp)->rpcb_entry_next; 254 if (! xdr_reference(xdrs, (caddr_t *)rp, 255 (u_int)sizeof (rpcb_entry_list), 256 (xdrproc_t)xdr_rpcb_entry)) { 257 return (FALSE); 258 } 259 if (freeing) { 260 next_copy = next; 261 rp = &next_copy; 262 /* 263 * Note that in the subsequent iteration, next_copy 264 * gets nulled out by the xdr_reference 265 * but next itself survives. 266 */ 267 } else { 268 rp = &((*rp)->rpcb_entry_next); 269 } 270 } 271 /*NOTREACHED*/ 272 } 273 274 /* 275 * XDR remote call arguments 276 * written for XDR_ENCODE direction only 277 */ 278 bool_t 279 xdr_rpcb_rmtcallargs(xdrs, p) 280 XDR *xdrs; 281 struct rpcb_rmtcallargs *p; 282 { 283 struct r_rpcb_rmtcallargs *objp = 284 (struct r_rpcb_rmtcallargs *)(void *)p; 285 u_int lenposition, argposition, position; 286 int32_t *buf; 287 288 _DIAGASSERT(p != NULL); 289 290 buf = XDR_INLINE(xdrs, 3 * BYTES_PER_XDR_UNIT); 291 if (buf == NULL) { 292 if (!xdr_u_int32_t(xdrs, &objp->prog)) { 293 return (FALSE); 294 } 295 if (!xdr_u_int32_t(xdrs, &objp->vers)) { 296 return (FALSE); 297 } 298 if (!xdr_u_int32_t(xdrs, &objp->proc)) { 299 return (FALSE); 300 } 301 } else { 302 IXDR_PUT_U_INT32(buf, objp->prog); 303 IXDR_PUT_U_INT32(buf, objp->vers); 304 IXDR_PUT_U_INT32(buf, objp->proc); 305 } 306 307 /* 308 * All the jugglery for just getting the size of the arguments 309 */ 310 lenposition = XDR_GETPOS(xdrs); 311 if (! xdr_u_int(xdrs, &(objp->args.args_len))) { 312 return (FALSE); 313 } 314 argposition = XDR_GETPOS(xdrs); 315 if (! (*objp->xdr_args)(xdrs, objp->args.args_val)) { 316 return (FALSE); 317 } 318 position = XDR_GETPOS(xdrs); 319 objp->args.args_len = (u_int)((u_long)position - (u_long)argposition); 320 XDR_SETPOS(xdrs, lenposition); 321 if (! xdr_u_int(xdrs, &(objp->args.args_len))) { 322 return (FALSE); 323 } 324 XDR_SETPOS(xdrs, position); 325 return (TRUE); 326 } 327 328 /* 329 * XDR remote call results 330 * written for XDR_DECODE direction only 331 */ 332 bool_t 333 xdr_rpcb_rmtcallres(xdrs, p) 334 XDR *xdrs; 335 struct rpcb_rmtcallres *p; 336 { 337 bool_t dummy; 338 struct r_rpcb_rmtcallres *objp = (struct r_rpcb_rmtcallres *)(void *)p; 339 340 _DIAGASSERT(p != NULL); 341 342 if (!xdr_string(xdrs, &objp->addr, (u_int)~0)) { 343 return (FALSE); 344 } 345 if (!xdr_u_int(xdrs, &objp->results.results_len)) { 346 return (FALSE); 347 } 348 dummy = (*(objp->xdr_res))(xdrs, objp->results.results_val); 349 return (dummy); 350 } 351 352 bool_t 353 xdr_netbuf(xdrs, objp) 354 XDR *xdrs; 355 struct netbuf *objp; 356 { 357 bool_t dummy; 358 359 _DIAGASSERT(objp != NULL); 360 361 if (!xdr_u_int32_t(xdrs, (u_int32_t *) &objp->maxlen)) { 362 return (FALSE); 363 } 364 dummy = xdr_bytes(xdrs, (char **)&(objp->buf), 365 (u_int *)&(objp->len), objp->maxlen); 366 return (dummy); 367 } 368