/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2006 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ /* All Rights Reserved */ /* * Portions of this source code were derived from Berkeley * 4.3 BSD under license from the Regents of the University of * California. */ /* * XDR routines for the rpcbinder version 3. */ #include "mt.h" #include <rpc/rpc.h> #include <rpc/types.h> #include <rpc/xdr.h> #include <rpc/rpcb_prot.h> bool_t xdr_rpcb(XDR *xdrs, RPCB *objp) { if (!xdr_u_int(xdrs, (uint_t *)&objp->r_prog)) return (FALSE); if (!xdr_u_int(xdrs, (uint_t *)&objp->r_vers)) return (FALSE); if (!xdr_string(xdrs, &objp->r_netid, ~0)) return (FALSE); if (!xdr_string(xdrs, &objp->r_addr, ~0)) return (FALSE); return (xdr_string(xdrs, &objp->r_owner, ~0)); } /* * rpcblist_ptr implements a linked list. The RPCL definition from * rpcb_prot.x is: * * struct rpcblist { * rpcb rpcb_map; * struct rpcblist *rpcb_next; * }; * typedef rpcblist *rpcblist_ptr; * * Recall that "pointers" in XDR are encoded as a boolean, indicating whether * there's any data behind the pointer, followed by the data (if any exists). * The boolean can be interpreted as ``more data follows me''; if FALSE then * nothing follows the boolean; if TRUE then the boolean is followed by an * actual struct rpcb, and another rpcblist_ptr (declared in RPCL as "struct * rpcblist *"). * * This could be implemented via the xdr_pointer type, though this would * result in one recursive call per element in the list. Rather than do that * we can ``unwind'' the recursion into a while loop and use xdr_reference to * serialize the rpcb elements. */ bool_t xdr_rpcblist_ptr(XDR *xdrs, rpcblist_ptr *rp) { /* * more_elements is pre-computed in case the direction is * XDR_ENCODE or XDR_FREE. more_elements is overwritten by * xdr_bool when the direction is XDR_DECODE. */ bool_t more_elements; int freeing = (xdrs->x_op == XDR_FREE); rpcblist_ptr next; rpcblist_ptr next_copy; for (;;) { more_elements = (bool_t)(*rp != NULL); if (!xdr_bool(xdrs, &more_elements)) return (FALSE); if (!more_elements) return (TRUE); /* we are done */ /* * the unfortunate side effect of non-recursion is that in * the case of freeing we must remember the next object * before we free the current object ... */ if (freeing) next = (*rp)->rpcb_next; if (!xdr_reference(xdrs, (caddr_t *)rp, (uint_t)sizeof (rpcblist), (xdrproc_t)xdr_rpcb)) return (FALSE); if (freeing) { next_copy = next; rp = &next_copy; /* * Note that in the subsequent iteration, next_copy * gets nulled out by the xdr_reference * but next itself survives. */ } else { rp = &((*rp)->rpcb_next); } } /*NOTREACHED*/ } /* * xdr_rpcblist() is specified to take a RPCBLIST **, but is identical in * functionality to xdr_rpcblist_ptr(). */ bool_t xdr_rpcblist(XDR *xdrs, RPCBLIST **rp) { return (xdr_rpcblist_ptr(xdrs, (rpcblist_ptr *)rp)); } bool_t xdr_rpcb_entry(XDR *xdrs, rpcb_entry *objp) { if (!xdr_string(xdrs, &objp->r_maddr, ~0)) return (FALSE); if (!xdr_string(xdrs, &objp->r_nc_netid, ~0)) return (FALSE); if (!xdr_u_int(xdrs, &objp->r_nc_semantics)) return (FALSE); if (!xdr_string(xdrs, &objp->r_nc_protofmly, ~0)) return (FALSE); return (xdr_string(xdrs, &objp->r_nc_proto, ~0)); } bool_t xdr_rpcb_entry_list_ptr(XDR *xdrs, rpcb_entry_list_ptr *rp) { /* * more_elements is pre-computed in case the direction is * XDR_ENCODE or XDR_FREE. more_elements is overwritten by * xdr_bool when the direction is XDR_DECODE. */ bool_t more_elements; int freeing = (xdrs->x_op == XDR_FREE); rpcb_entry_list_ptr next; rpcb_entry_list_ptr next_copy; for (;;) { more_elements = (bool_t)(*rp != NULL); if (!xdr_bool(xdrs, &more_elements)) return (FALSE); if (!more_elements) return (TRUE); /* we are done */ /* * the unfortunate side effect of non-recursion is that in * the case of freeing we must remember the next object * before we free the current object ... */ if (freeing) next = (*rp)->rpcb_entry_next; if (!xdr_reference(xdrs, (caddr_t *)rp, (uint_t)sizeof (rpcb_entry_list), (xdrproc_t)xdr_rpcb_entry)) return (FALSE); if (freeing) { next_copy = next; rp = &next_copy; /* * Note that in the subsequent iteration, next_copy * gets nulled out by the xdr_reference * but next itself survives. */ } else { rp = &((*rp)->rpcb_entry_next); } } /*NOTREACHED*/ } /* * XDR remote call arguments * written for XDR_ENCODE direction only */ bool_t xdr_rpcb_rmtcallargs(XDR *xdrs, struct r_rpcb_rmtcallargs *objp) { uint_t lenposition, argposition, position; rpc_inline_t *buf; buf = XDR_INLINE(xdrs, 3 * BYTES_PER_XDR_UNIT); if (buf == NULL) { if (!xdr_u_int(xdrs, (uint_t *)&objp->prog)) return (FALSE); if (!xdr_u_int(xdrs, (uint_t *)&objp->vers)) return (FALSE); if (!xdr_u_int(xdrs, (uint_t *)&objp->proc)) return (FALSE); } else { IXDR_PUT_U_INT32(buf, objp->prog); IXDR_PUT_U_INT32(buf, objp->vers); IXDR_PUT_U_INT32(buf, objp->proc); } /* * All the jugglery for just getting the size of the arguments */ lenposition = XDR_GETPOS(xdrs); if (!xdr_u_int(xdrs, &(objp->args.args_len))) return (FALSE); argposition = XDR_GETPOS(xdrs); if (!(*objp->xdr_args)(xdrs, objp->args.args_val)) return (FALSE); position = XDR_GETPOS(xdrs); objp->args.args_len = (uint_t)position - (uint_t)argposition; XDR_SETPOS(xdrs, lenposition); if (!xdr_u_int(xdrs, &(objp->args.args_len))) return (FALSE); XDR_SETPOS(xdrs, position); return (TRUE); } /* * XDR remote call results * written for XDR_DECODE direction only */ bool_t xdr_rpcb_rmtcallres(XDR *xdrs, struct r_rpcb_rmtcallres *objp) { if (!xdr_string(xdrs, &objp->addr, ~0)) return (FALSE); if (!xdr_u_int(xdrs, &objp->results.results_len)) return (FALSE); return ((*(objp->xdr_res))(xdrs, objp->results.results_val)); } bool_t xdr_netbuf(XDR *xdrs, struct netbuf *objp) { bool_t res; /* * Save the passed in maxlen value and buf pointer. We might * need them later. */ uint_t maxlen_save = objp->maxlen; void *buf_save = objp->buf; if (!xdr_u_int(xdrs, &objp->maxlen)) return (FALSE); /* * We need to free maxlen, not len, so do it explicitly now. */ if (xdrs->x_op == XDR_FREE) return (xdr_bytes(xdrs, &objp->buf, &objp->maxlen, objp->maxlen)); /* * If we're decoding and the caller has already allocated a * buffer restore the maxlen value since the decoded value * doesn't apply to the caller's buffer. xdr_bytes() will * return an error if the buffer isn't big enough. */ if (xdrs->x_op == XDR_DECODE && objp->buf != NULL) objp->maxlen = maxlen_save; res = xdr_bytes(xdrs, &objp->buf, &objp->len, objp->maxlen); /* * If we are decoding and the buffer was allocated in the * xdr_bytes() function we need to set maxlen properly to * follow the netbuf semantics. */ if (xdrs->x_op == XDR_DECODE && objp->buf != buf_save) objp->maxlen = objp->len; return (res); }
