1 /* $NetBSD: rpcb_prot.c,v 1.3 2000/07/14 08:40:42 fvdl Exp $ */ 2 3 /*- 4 * Copyright (c) 2009, Sun Microsystems, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * - Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * - Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * - Neither the name of Sun Microsystems, Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived 16 * from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 /* 31 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 32 */ 33 34 /* #ident "@(#)rpcb_prot.c 1.13 94/04/24 SMI" */ 35 36 #if defined(LIBC_SCCS) && !defined(lint) 37 static char sccsid[] = "@(#)rpcb_prot.c 1.9 89/04/21 Copyr 1984 Sun Micro"; 38 #endif 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 /* 43 * rpcb_prot.c 44 * XDR routines for the rpcbinder version 3. 45 * 46 * Copyright (C) 1984, 1988, Sun Microsystems, Inc. 47 */ 48 49 #include "namespace.h" 50 #include <rpc/rpc.h> 51 #include <rpc/types.h> 52 #include <rpc/xdr.h> 53 #include <rpc/rpcb_prot.h> 54 #include "un-namespace.h" 55 56 bool_t 57 xdr_rpcb(XDR *xdrs, RPCB *objp) 58 { 59 if (!xdr_u_int32_t(xdrs, &objp->r_prog)) { 60 return (FALSE); 61 } 62 if (!xdr_u_int32_t(xdrs, &objp->r_vers)) { 63 return (FALSE); 64 } 65 if (!xdr_string(xdrs, &objp->r_netid, (u_int)~0)) { 66 return (FALSE); 67 } 68 if (!xdr_string(xdrs, &objp->r_addr, (u_int)~0)) { 69 return (FALSE); 70 } 71 if (!xdr_string(xdrs, &objp->r_owner, (u_int)~0)) { 72 return (FALSE); 73 } 74 return (TRUE); 75 } 76 77 /* 78 * rpcblist_ptr implements a linked list. The RPCL definition from 79 * rpcb_prot.x is: 80 * 81 * struct rpcblist { 82 * rpcb rpcb_map; 83 * struct rpcblist *rpcb_next; 84 * }; 85 * typedef rpcblist *rpcblist_ptr; 86 * 87 * Recall that "pointers" in XDR are encoded as a boolean, indicating whether 88 * there's any data behind the pointer, followed by the data (if any exists). 89 * The boolean can be interpreted as ``more data follows me''; if FALSE then 90 * nothing follows the boolean; if TRUE then the boolean is followed by an 91 * actual struct rpcb, and another rpcblist_ptr (declared in RPCL as "struct 92 * rpcblist *"). 93 * 94 * This could be implemented via the xdr_pointer type, though this would 95 * result in one recursive call per element in the list. Rather than do that 96 * we can ``unwind'' the recursion into a while loop and use xdr_reference to 97 * serialize the rpcb elements. 98 */ 99 100 bool_t 101 xdr_rpcblist_ptr(XDR *xdrs, rpcblist_ptr *rp) 102 { 103 /* 104 * more_elements is pre-computed in case the direction is 105 * XDR_ENCODE or XDR_FREE. more_elements is overwritten by 106 * xdr_bool when the direction is XDR_DECODE. 107 */ 108 bool_t more_elements; 109 int freeing = (xdrs->x_op == XDR_FREE); 110 rpcblist_ptr next; 111 rpcblist_ptr next_copy; 112 113 next = NULL; 114 for (;;) { 115 more_elements = (bool_t)(*rp != NULL); 116 if (! xdr_bool(xdrs, &more_elements)) { 117 return (FALSE); 118 } 119 if (! more_elements) { 120 return (TRUE); /* we are done */ 121 } 122 /* 123 * the unfortunate side effect of non-recursion is that in 124 * the case of freeing we must remember the next object 125 * before we free the current object ... 126 */ 127 if (freeing && *rp) 128 next = (*rp)->rpcb_next; 129 if (! xdr_reference(xdrs, (caddr_t *)rp, 130 (u_int)sizeof (rpcblist), (xdrproc_t)xdr_rpcb)) { 131 return (FALSE); 132 } 133 if (freeing) { 134 next_copy = next; 135 rp = &next_copy; 136 /* 137 * Note that in the subsequent iteration, next_copy 138 * gets nulled out by the xdr_reference 139 * but next itself survives. 140 */ 141 } else if (*rp) { 142 rp = &((*rp)->rpcb_next); 143 } 144 } 145 /*NOTREACHED*/ 146 } 147 148 /* 149 * xdr_rpcblist() is specified to take a RPCBLIST **, but is identical in 150 * functionality to xdr_rpcblist_ptr(). 151 */ 152 bool_t 153 xdr_rpcblist(XDR *xdrs, RPCBLIST **rp) 154 { 155 bool_t dummy; 156 157 dummy = xdr_rpcblist_ptr(xdrs, (rpcblist_ptr *)rp); 158 return (dummy); 159 } 160 161 162 bool_t 163 xdr_rpcb_entry(XDR *xdrs, rpcb_entry *objp) 164 { 165 if (!xdr_string(xdrs, &objp->r_maddr, (u_int)~0)) { 166 return (FALSE); 167 } 168 if (!xdr_string(xdrs, &objp->r_nc_netid, (u_int)~0)) { 169 return (FALSE); 170 } 171 if (!xdr_u_int32_t(xdrs, &objp->r_nc_semantics)) { 172 return (FALSE); 173 } 174 if (!xdr_string(xdrs, &objp->r_nc_protofmly, (u_int)~0)) { 175 return (FALSE); 176 } 177 if (!xdr_string(xdrs, &objp->r_nc_proto, (u_int)~0)) { 178 return (FALSE); 179 } 180 return (TRUE); 181 } 182 183 bool_t 184 xdr_rpcb_entry_list_ptr(XDR *xdrs, rpcb_entry_list_ptr *rp) 185 { 186 /* 187 * more_elements is pre-computed in case the direction is 188 * XDR_ENCODE or XDR_FREE. more_elements is overwritten by 189 * xdr_bool when the direction is XDR_DECODE. 190 */ 191 bool_t more_elements; 192 int freeing = (xdrs->x_op == XDR_FREE); 193 rpcb_entry_list_ptr next; 194 rpcb_entry_list_ptr next_copy; 195 196 next = NULL; 197 for (;;) { 198 more_elements = (bool_t)(*rp != NULL); 199 if (! xdr_bool(xdrs, &more_elements)) { 200 return (FALSE); 201 } 202 if (! more_elements) { 203 return (TRUE); /* we are done */ 204 } 205 /* 206 * the unfortunate side effect of non-recursion is that in 207 * the case of freeing we must remember the next object 208 * before we free the current object ... 209 */ 210 if (freeing && *rp) 211 next = (*rp)->rpcb_entry_next; 212 if (! xdr_reference(xdrs, (caddr_t *)rp, 213 (u_int)sizeof (rpcb_entry_list), 214 (xdrproc_t)xdr_rpcb_entry)) { 215 return (FALSE); 216 } 217 if (freeing) { 218 next_copy = next; 219 rp = &next_copy; 220 /* 221 * Note that in the subsequent iteration, next_copy 222 * gets nulled out by the xdr_reference 223 * but next itself survives. 224 */ 225 } else if (*rp) { 226 rp = &((*rp)->rpcb_entry_next); 227 } 228 } 229 /*NOTREACHED*/ 230 } 231 232 /* 233 * XDR remote call arguments 234 * written for XDR_ENCODE direction only 235 */ 236 bool_t 237 xdr_rpcb_rmtcallargs(XDR *xdrs, struct rpcb_rmtcallargs *p) 238 { 239 struct r_rpcb_rmtcallargs *objp = 240 (struct r_rpcb_rmtcallargs *)(void *)p; 241 u_int lenposition, argposition, position; 242 int32_t *buf; 243 244 buf = XDR_INLINE(xdrs, 3 * BYTES_PER_XDR_UNIT); 245 if (buf == NULL) { 246 if (!xdr_u_int32_t(xdrs, &objp->prog)) { 247 return (FALSE); 248 } 249 if (!xdr_u_int32_t(xdrs, &objp->vers)) { 250 return (FALSE); 251 } 252 if (!xdr_u_int32_t(xdrs, &objp->proc)) { 253 return (FALSE); 254 } 255 } else { 256 IXDR_PUT_U_INT32(buf, objp->prog); 257 IXDR_PUT_U_INT32(buf, objp->vers); 258 IXDR_PUT_U_INT32(buf, objp->proc); 259 } 260 261 /* 262 * All the jugglery for just getting the size of the arguments 263 */ 264 lenposition = XDR_GETPOS(xdrs); 265 if (! xdr_u_int(xdrs, &(objp->args.args_len))) { 266 return (FALSE); 267 } 268 argposition = XDR_GETPOS(xdrs); 269 if (! (*objp->xdr_args)(xdrs, objp->args.args_val)) { 270 return (FALSE); 271 } 272 position = XDR_GETPOS(xdrs); 273 objp->args.args_len = (u_int)((u_long)position - (u_long)argposition); 274 XDR_SETPOS(xdrs, lenposition); 275 if (! xdr_u_int(xdrs, &(objp->args.args_len))) { 276 return (FALSE); 277 } 278 XDR_SETPOS(xdrs, position); 279 return (TRUE); 280 } 281 282 /* 283 * XDR remote call results 284 * written for XDR_DECODE direction only 285 */ 286 bool_t 287 xdr_rpcb_rmtcallres(XDR *xdrs, struct rpcb_rmtcallres *p) 288 { 289 bool_t dummy; 290 struct r_rpcb_rmtcallres *objp = (struct r_rpcb_rmtcallres *)(void *)p; 291 292 if (!xdr_string(xdrs, &objp->addr, (u_int)~0)) { 293 return (FALSE); 294 } 295 if (!xdr_u_int(xdrs, &objp->results.results_len)) { 296 return (FALSE); 297 } 298 dummy = (*(objp->xdr_res))(xdrs, objp->results.results_val); 299 return (dummy); 300 } 301 302 bool_t 303 xdr_netbuf(XDR *xdrs, struct netbuf *objp) 304 { 305 bool_t dummy; 306 void **pp; 307 308 if (!xdr_u_int32_t(xdrs, (u_int32_t *) &objp->maxlen)) { 309 return (FALSE); 310 } 311 pp = &objp->buf; 312 dummy = xdr_bytes(xdrs, (char **) pp, 313 (u_int *)&(objp->len), objp->maxlen); 314 return (dummy); 315 } 316