1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 * 29 * @(#)rpcb_prot.c 1.13 94/04/24 SMI; 1.9 89/04/21 Copyr 1984 Sun Micro 30 * $NetBSD: rpcb_prot.c,v 1.3 2000/07/14 08:40:42 fvdl Exp $ 31 * $FreeBSD: src/lib/libc/rpc/rpcb_prot.c,v 1.7 2007/11/20 01:51:20 jb Exp $ 32 * $DragonFly$ 33 */ 34 /* 35 * Copyright (c) 1986-1991 by Sun Microsystems Inc. 36 */ 37 38 /* 39 * rpcb_prot.c 40 * XDR routines for the rpcbinder version 3. 41 * 42 * Copyright (C) 1984, 1988, Sun Microsystems, Inc. 43 */ 44 45 #include "namespace.h" 46 #include <rpc/rpc.h> 47 #include <rpc/types.h> 48 #include <rpc/xdr.h> 49 #include <rpc/rpcb_prot.h> 50 #include "un-namespace.h" 51 52 bool_t 53 xdr_rpcb(XDR *xdrs, RPCB *objp) 54 { 55 if (!xdr_u_int32_t(xdrs, &objp->r_prog)) { 56 return (FALSE); 57 } 58 if (!xdr_u_int32_t(xdrs, &objp->r_vers)) { 59 return (FALSE); 60 } 61 if (!xdr_string(xdrs, &objp->r_netid, (u_int)~0)) { 62 return (FALSE); 63 } 64 if (!xdr_string(xdrs, &objp->r_addr, (u_int)~0)) { 65 return (FALSE); 66 } 67 if (!xdr_string(xdrs, &objp->r_owner, (u_int)~0)) { 68 return (FALSE); 69 } 70 return (TRUE); 71 } 72 73 /* 74 * rpcblist_ptr implements a linked list. The RPCL definition from 75 * rpcb_prot.x is: 76 * 77 * struct rpcblist { 78 * rpcb rpcb_map; 79 * struct rpcblist *rpcb_next; 80 * }; 81 * typedef rpcblist *rpcblist_ptr; 82 * 83 * Recall that "pointers" in XDR are encoded as a boolean, indicating whether 84 * there's any data behind the pointer, followed by the data (if any exists). 85 * The boolean can be interpreted as ``more data follows me''; if FALSE then 86 * nothing follows the boolean; if TRUE then the boolean is followed by an 87 * actual struct rpcb, and another rpcblist_ptr (declared in RPCL as "struct 88 * rpcblist *"). 89 * 90 * This could be implemented via the xdr_pointer type, though this would 91 * result in one recursive call per element in the list. Rather than do that 92 * we can ``unwind'' the recursion into a while loop and use xdr_reference to 93 * serialize the rpcb elements. 94 */ 95 96 bool_t 97 xdr_rpcblist_ptr(XDR *xdrs, rpcblist_ptr *rp) 98 { 99 /* 100 * more_elements is pre-computed in case the direction is 101 * XDR_ENCODE or XDR_FREE. more_elements is overwritten by 102 * xdr_bool when the direction is XDR_DECODE. 103 */ 104 bool_t more_elements; 105 int freeing = (xdrs->x_op == XDR_FREE); 106 rpcblist_ptr next; 107 rpcblist_ptr next_copy; 108 109 next = NULL; 110 for (;;) { 111 more_elements = (bool_t)(*rp != NULL); 112 if (! xdr_bool(xdrs, &more_elements)) { 113 return (FALSE); 114 } 115 if (! more_elements) { 116 return (TRUE); /* we are done */ 117 } 118 /* 119 * the unfortunate side effect of non-recursion is that in 120 * the case of freeing we must remember the next object 121 * before we free the current object ... 122 */ 123 if (freeing && *rp) 124 next = (*rp)->rpcb_next; 125 if (! xdr_reference(xdrs, (caddr_t *)rp, 126 (u_int)sizeof (rpcblist), (xdrproc_t)xdr_rpcb)) { 127 return (FALSE); 128 } 129 if (freeing) { 130 next_copy = next; 131 rp = &next_copy; 132 /* 133 * Note that in the subsequent iteration, next_copy 134 * gets nulled out by the xdr_reference 135 * but next itself survives. 136 */ 137 } else if (*rp) { 138 rp = &((*rp)->rpcb_next); 139 } 140 } 141 /*NOTREACHED*/ 142 } 143 144 /* 145 * xdr_rpcblist() is specified to take a RPCBLIST **, but is identical in 146 * functionality to xdr_rpcblist_ptr(). 147 */ 148 bool_t 149 xdr_rpcblist(XDR *xdrs, RPCBLIST **rp) 150 { 151 bool_t dummy; 152 153 dummy = xdr_rpcblist_ptr(xdrs, (rpcblist_ptr *)rp); 154 return (dummy); 155 } 156 157 158 bool_t 159 xdr_rpcb_entry(XDR *xdrs, rpcb_entry *objp) 160 { 161 if (!xdr_string(xdrs, &objp->r_maddr, (u_int)~0)) { 162 return (FALSE); 163 } 164 if (!xdr_string(xdrs, &objp->r_nc_netid, (u_int)~0)) { 165 return (FALSE); 166 } 167 if (!xdr_u_int32_t(xdrs, &objp->r_nc_semantics)) { 168 return (FALSE); 169 } 170 if (!xdr_string(xdrs, &objp->r_nc_protofmly, (u_int)~0)) { 171 return (FALSE); 172 } 173 if (!xdr_string(xdrs, &objp->r_nc_proto, (u_int)~0)) { 174 return (FALSE); 175 } 176 return (TRUE); 177 } 178 179 bool_t 180 xdr_rpcb_entry_list_ptr(XDR *xdrs, rpcb_entry_list_ptr *rp) 181 { 182 /* 183 * more_elements is pre-computed in case the direction is 184 * XDR_ENCODE or XDR_FREE. more_elements is overwritten by 185 * xdr_bool when the direction is XDR_DECODE. 186 */ 187 bool_t more_elements; 188 int freeing = (xdrs->x_op == XDR_FREE); 189 rpcb_entry_list_ptr next; 190 rpcb_entry_list_ptr next_copy; 191 192 next = NULL; 193 for (;;) { 194 more_elements = (bool_t)(*rp != NULL); 195 if (! xdr_bool(xdrs, &more_elements)) { 196 return (FALSE); 197 } 198 if (! more_elements) { 199 return (TRUE); /* we are done */ 200 } 201 /* 202 * the unfortunate side effect of non-recursion is that in 203 * the case of freeing we must remember the next object 204 * before we free the current object ... 205 */ 206 if (freeing) 207 next = (*rp)->rpcb_entry_next; 208 if (! xdr_reference(xdrs, (caddr_t *)rp, 209 (u_int)sizeof (rpcb_entry_list), 210 (xdrproc_t)xdr_rpcb_entry)) { 211 return (FALSE); 212 } 213 if (freeing && *rp) { 214 next_copy = next; 215 rp = &next_copy; 216 /* 217 * Note that in the subsequent iteration, next_copy 218 * gets nulled out by the xdr_reference 219 * but next itself survives. 220 */ 221 } else if (*rp) { 222 rp = &((*rp)->rpcb_entry_next); 223 } 224 } 225 /*NOTREACHED*/ 226 } 227 228 /* 229 * XDR remote call arguments 230 * written for XDR_ENCODE direction only 231 */ 232 bool_t 233 xdr_rpcb_rmtcallargs(XDR *xdrs, struct rpcb_rmtcallargs *p) 234 { 235 struct r_rpcb_rmtcallargs *objp = 236 (struct r_rpcb_rmtcallargs *)(void *)p; 237 u_int lenposition, argposition, position; 238 int32_t *buf; 239 240 buf = XDR_INLINE(xdrs, 3 * BYTES_PER_XDR_UNIT); 241 if (buf == NULL) { 242 if (!xdr_u_int32_t(xdrs, &objp->prog)) { 243 return (FALSE); 244 } 245 if (!xdr_u_int32_t(xdrs, &objp->vers)) { 246 return (FALSE); 247 } 248 if (!xdr_u_int32_t(xdrs, &objp->proc)) { 249 return (FALSE); 250 } 251 } else { 252 IXDR_PUT_U_INT32(buf, objp->prog); 253 IXDR_PUT_U_INT32(buf, objp->vers); 254 IXDR_PUT_U_INT32(buf, objp->proc); 255 } 256 257 /* 258 * All the jugglery for just getting the size of the arguments 259 */ 260 lenposition = XDR_GETPOS(xdrs); 261 if (! xdr_u_int(xdrs, &(objp->args.args_len))) { 262 return (FALSE); 263 } 264 argposition = XDR_GETPOS(xdrs); 265 if (! (*objp->xdr_args)(xdrs, objp->args.args_val)) { 266 return (FALSE); 267 } 268 position = XDR_GETPOS(xdrs); 269 objp->args.args_len = (u_int)((u_long)position - (u_long)argposition); 270 XDR_SETPOS(xdrs, lenposition); 271 if (! xdr_u_int(xdrs, &(objp->args.args_len))) { 272 return (FALSE); 273 } 274 XDR_SETPOS(xdrs, position); 275 return (TRUE); 276 } 277 278 /* 279 * XDR remote call results 280 * written for XDR_DECODE direction only 281 */ 282 bool_t 283 xdr_rpcb_rmtcallres(XDR *xdrs, struct rpcb_rmtcallres *p) 284 { 285 bool_t dummy; 286 struct r_rpcb_rmtcallres *objp = (struct r_rpcb_rmtcallres *)(void *)p; 287 288 if (!xdr_string(xdrs, &objp->addr, (u_int)~0)) { 289 return (FALSE); 290 } 291 if (!xdr_u_int(xdrs, &objp->results.results_len)) { 292 return (FALSE); 293 } 294 dummy = (*(objp->xdr_res))(xdrs, objp->results.results_val); 295 return (dummy); 296 } 297 298 bool_t 299 xdr_netbuf(XDR *xdrs, struct netbuf *objp) 300 { 301 bool_t dummy; 302 void **pp; 303 304 if (!xdr_u_int32_t(xdrs, (u_int32_t *) &objp->maxlen)) { 305 return (FALSE); 306 } 307 pp = &objp->buf; 308 dummy = xdr_bytes(xdrs, (char **) pp, 309 (u_int *)&(objp->len), objp->maxlen); 310 return (dummy); 311 } 312